Credit refund not paid

I started selling Avon and Justine last month, I paid 2 x R250-00 deposits and did my first order. As I am moving to Cape Town end of the month and will not be selling anymore and contact the credit control dept to ask about the process to follow to get my deposits back. They responded and I send a letter and my bank details confirmation as requested. I do not have proof of payment as I paid cash at checkers ********** I was the told that they can not process my refunds as the need proof of payment. If a log in as a representative the credits is clearly showing on both accounts. This is unacceptable as both accounts has been deactivated so what will happen to the credits if not paid to me?