AVBOB incompompete cost me my cash back payment.

I have submitted my cash back payout claim since January, then on the 15th of february i send my current bank statement and all the necessary documents to the claims department, but on the 23rd of february one of your stupid and *********** consultants paid my cash back to someone else's bank account number ***, until to this day I'm being made to run from pillar to post fixing your incompetence buy providing proof which i know nothing about how and where am going to provide this proof.