A spirit tried to moke me

I was trying to summon forth a demon of goetia.then one spirit came to me and said thats he is the goetic im trying to call forth…I ask him to give proof of his identitie and he refused.he slso refused to swear to speak truthfully. …
So what did I do to attract a lesser spirit?and how to avoid the same result again?

Can you give more details of how exactly you tried to evoke the spirit, and any preparations you did before it?