POOR SERVICE STORE MANAGER

I made an EFT payment towards my installment account with Cherckers house and home in Sandton. On the 30th of April I was debited again and I phoned (Rainbow finance) their accounts department to request a refund and I went through the process as they requested and finally the told me to collect the cash at the store. I went to the store to collect the money and I spoke to the staff that could not help me, reason being that they do not have cash. Called manger and he also told me that there is nothing he can do. Couldn't not offer me a cheque or EFT back to my account and on top of that they were rude about it.