I don’t know if my response will help you. I have not work with Met Kalfu. I hope I can shed some light for you.
Legba/Elegua has many paths, one of them being a bit of a trickster, playing practical jokes, in a harmless, kind of way. In my experience it has to do with offerings and how your reaching out to him, maybe even what’s currently going on in your life.
I will share experiences with him I had myself.
I had an altar set up to him, I added a lot of toys and candy, I would ask for help with this and that. Oddly enough, he didn’t come through, when I asked an elder he told me to remove the toys and candy and give him green tomatoes, with plam oil, the usual rum and a cigar. Boom! My path was open, then I gave him his toys and candy.
That’s just one of my personal experiences with him. You can light a seven day candle for him, smear a bit of plam oil on top, place a glass of cold water in front of it (always try to fire proof that area, use sand, etc. just in case things heat up) most online curio shops sell candles for him and ask him to tell you in a dream why he’s jesting with you, you will get your answer.
Tricks Legba played on me, I walked into a mens bathroom used it and didn’t realize it, till I was walking out. When I walked in there was no urinals. While looking for parking in a parking garage at an airport all the lights where green and I was going the wrong way. I was on my way to consult within my House. Things like that, classic Legba. At those times in my life, I needed to lighten up, I was so serious about my life I was not enjoying myself. The people in that house of Saints, were leading me, literally, “the wrong way”. With the men’s bathroom, now I literally do all the chores my husband can’t do, cause of his illness. I do both roles in my home, the housework and taking the trash out, etc. Those messages from him took weeks to years to manifest, so you may want to journal your experiences with him. You will see it, the guidance under a ruse, so to speak.
I think there’s a message there for you, with your experiences with him. I know it can been frustrating at times, in what regard to what, I don’t know but I sincerely hope he guides you on your path.
I have had those aha moments with him plenty of times.
I hope that helps! I wish you well on your path.