Very Bad Service

I am still struggling with Standard Bank. We are under debt review as from January 2018 and is paying our installment every month as agreed. My pension fund from Liberty was by mistake paid into my cheque account and the moment I realised it I asked them to refund. They do have different explanations why it cannot be refunded and the storey changes every time. It is nearly two months now and still struggling to get my money from them. Every time a different answer or just now answer... just holding for hours on the line.