Bad service

I don't even know where to start because after being a loyal customer to MTN I get a bad service. I won a competition worth 3000 it was transferred to someone's Momo account now I am being told that I could I have called by that and inform them. How can you ask someone for her personal details and not see that the account you transfer money to it's not the same person and the nerve of the consultant To tell me to call the person responsible yoh.The other thing I have been going forth and forth with just resetting my pin for Momo account. I disappointed shame