R5000 can be traced

I'm so disappoint with Old mutual I deposited money on there account which was wrong account from my app. Now when I asked them if they can track the deposit they ask for proof of payment. I gave them and still they no answer. I went to the walk in at Mutual park to found out on Monday because call centre failed me. They told me it will take 48 hours to sort out my enquiry. Today I went the mutual park old lady assited me and told me they don't have this account l paid to. I must go back to FNB they must tell me to where's my money. FNB asked to go back to old mutual and ask the consultant to call them. When I got the Monday lady assited me konws about my enquiry. Tell me manager escalate my matter u will get answer right now. 1 hour later they tell me loadshadding they will call me. When I asked the lady about old lady she thought I was talking about money something that I don't have account with it. I almost died to day. Deposited R5000 no one knows about it's so strange because I trust this 2 companies.