For one thing, do not believe ANY "psychic" who guarantees results! It is impossible for a true psychic to do that, and a legitimate psychic will NOT make any kind of guarantees. They can't.
I'm sorry you got scammed. Please look for legitimate psychics in your area. They are there. Ask friends and family to recommend someone. Check with your local metaphysical shop.
And NEVER NEVER NEVER go to a place with a sign out front offering palm reading or other types of readings. You know the ones I'm talking about -- usually a cute little house with a sign out front offering cheap palm readings or card readings. They're scams.
Also get up and walk out if a 'psychic' tells you someone has placed a spell/curse on you or you've picked up negative energy and then wants to charge you a lot of money to do some prayers or a ritual to clear the spell or energy. It's a SCAM!
Some will offer you a 'special' set of incense, candles, etc for over a hundred dollars to take home and work with. Those candles and incense can be purchased for a few bucks at a metaphysical shop.