Multichoice Cannot Track payment

I made a cash payment of R300.00 at PnP on 28 January 2015 for our monthly compact subscription and this morning I found that our DSTV has been disconnected my service. I called the contact center and they said that I owe R500 plus R50 reconnection fee as they cannot trace my payment. Donald who I spoke to said there is nothing he can do and cannot help me at all as I need to find the slip and send it to him so he can reactivate my service. He gave me an option to find the slip or make another payment because his hands are tied. He would not even help by contacting the accounts department to trace the funds.DSTV is not willing to help their customers and I find that very disappointing. It shouldnt be the customers problem if the are issues between Multichoice and their partners in the way they operate. I need someone to find that payment and reconnect our service as payment was made well before the due date!!!