Multichoice and PayU should just terminate their contract

Multichoice and PayU should just part ways. I paid my account via the dstv app and the payment was debited from my account, but wasn't processed by payu. After calling them, they gave me a reference number to give to multichoice, so that they can trace the payment. I don't know how many emails I've sent to them and even called them, only to be told that they want a proof of payment not the reference number from a company they work with. Maybe I'm mad, but this is starting to irritate me, because it's happening for the second time now.