Bad customer experience and not being cared for

I have my music system that, I pawn with cash converters Cresta few month ago, I have being making paying for interest on item in time as i was not yet ready to collect my music system.So last month I had to go to one of the family member funeral and month end was on Sunday.

I couldn't make it back to Joburg in time in order to make the payment for my sound system as i was busy with the funeral and emotionally I'm not ok as I'm still grieving for the loss of my family member.

So today, I come back to cash converters Cresta to make payment and I was told i need to talk to the manager who told me that my stuff is already sold.

I really don't understand this? How does cash converters treat the customers. How do the sell my stuff in two days? Yes I understand that i was late for my payment, off which it was under the circumstances I could avoid even if i wanted to..

I really need some answer as i still want my music system, I didn't want to sell it..I really believe there is time that's given and procedures that have to be followed before things are placed for sale..In this case can somebody assist