Your first mistake was assuming what came was what you asked for, your seconds was giving it power based on the name.
Given the state you were in, and that you were inexperience and didn’t know to banish first, you were already attracting parasites, and any if them would have found this the perfect opportunity to worm their way into your psyche.
yeah - so what I see in this is what I would call parasites. The good news is they are easy to get rid of, but the bad new is you have to have confidence in yourself and you don’t.
See here:
You know, if this was me I’d be ABSOLUTELY LIVID and on the war path. You are not nearly angry enough at this attack on you. This is not OK and you need to stand up for yourself way harder.
Don’t bother about what names are used - that’s all a lie and doesn’t matter. All parasites do is lie it’s a hallmark for them. You have every red flag for parasitism, from the conditions you summoned in to your weakness, to its disrespect and refusal to respect free will.
Parasites are like ticks, they embed in your energy and it’s hard to get them out, but they are actually small, weak and easily killed once you can get hold of them. They just want to feed and will do anything to stay attached.
We have a ton of posts about killing parasites here: Forum Tutorials: Parasite Collection I suggest reading through them to get an understanding of what you’re dealing with and what’s possible.
While you’re doing that get your mind and heart right - these are your weapons and your defense and you sound like you are not standing in your power.
If this was me, here’s how I’d get started handling this:
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First of all, IT. Not he - don’t give it the dignity of humanity, it’s an it. It’s LESS than you, weaker, it’s pathetic or it wouldn’t need you to live. Also stop calling it Lucifer, it’s not and this causes you to give it power over you, so stop doing that. It doesn’t have a name; it’s astral garbage.
So this is fixed, great! 
Give yourself credit for this, start realising you’re stronger and all you have to do is stand up
Bullshit. These lying pieces of dogshit need to be taught a lesson. It’s not only not thier business, what they’re doing is making you make a certain kind of negative energy which is the yummy food they want.
NEVER talk to these parasites - they ONLY lie, it’s their MO, so talking to them is a waste of time and only gives them a chance to psyche you out. As you have seen.
Right - you need info, and it’s time to attack. The link above is a start. You will also need this Unofficial Tutorials: Spiritual Hygiene & Defense Collection
Honestly, the behavior is bad enough that there’s no need to give it fair warning by telling it to fuck off, just hit it with all you’ve got.
Again, also bullshit designed to make you doubt yourself so you don’t fight.
Don’t call them by any known names, don’t credit them as being higher beings that they’re not - get your MIND into a strong space by both acknowledging your own power, and into diminishing these shitheads as much as you can.
See them as the stinky little slimy, black leeches they actually are, worming into your mind like viruses. Only earthbound beings can defy free will because they also have it. The higher beings keep the rules. That’s how you know the difference.
So.
4) Burn them with fire before they lay eggs. Today.
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UPG caveat: The bigger one sees me looking at him and tried to pull the “I’m lucifer” bs on me too, it’s so very not. I’ve met lucifer and this is an astral animal. the smaller one is nothing to sniff at and all for show. I showed them what I’d do to them if they don’t let you go, and now they’ve backed off. They now know they should let you win because that’s their best chance for survival. Note however, parasites are incredibly stupid and basic, so it’s going to be a fight anyway.
IMPORTANT:
They’re going to try to hide. This is part of why you forget them - your attempts are successful, they scare them, and they lay low for a while so you think they’re gone or aren’t important. This is also common for parasites. I call it embedding, like ticks as I said before.
So don’t let them hide - hunt them in your minds eye, find them, catch them, hold them and burn them to ash, and keep doing it every day until you root them out from every niche they try to hide in. Don’t let them pretend they’ve gone away.