"Vodou spell" isnt really a thing as Vodouis a religion with its own magical system. a "spell" in vodou is usually work done under a spirit. I would contact the person who might have done this work and ask them questions about the work done on your behalf.
If your going to be walking the path of Voudon, more accurately Haitian Voudon, youll start with Legba the keeper of the gates. If your able to facilitate two way communication with Legba hell make the introduction to the other loa, the Rada, Petro, & Ghede