Cash Converters stole my Lay-Buy deposit!

I wanted to buy equipment from Cash Converters Boksburg, and since I did not have enough funds at the time, I paid R1500 deposit. I however got retrenched and could make additional payments in the next few months. When I had money again, I went back to the store to make another payment. However the manager (Dolf) told me that they had sold the equipment. I asked him why they did not call me, as I really wanted the equipment and would have made some plan to keep paying. I asked him about the deposit. He said that since I did not keep on paying, I had forfeited the deposit. He was however prepared to give me a discount on some other goods to the value of R1500 and said I could come any time to claim the discount. Since then I spoke with Bongani at Cash Converters Greenstone and he told me that I was supposed to get the money back. I recently went back to the store and asked for a copy of the original laybuy agreement. It says on there that I was supposed to be refunded. Dolf is no longer working there and I spoke with Mcdonald. I asked him again about the deposit and he confirmed that I should have been refunded. He said that the Laybuy agreement had been cancelled, meaning that I should have been refunded. It now seems that the previous manager Dolf had cancelled my agreement without notifying me and pocketed the money. I asked them very nicely to please resolve the issue and to refund the money. I also told them that if it not resolved that I go to social media and report them. I am also considering reporting the matter to the Financial services board and the police, now that I know for sure that was supposed to have been refunded. They however shrugged their shoulders and said they could not help me. That is unfortunately not good enough.