Refund takes 7 to days

On the 1st of April I've paid 7750.00 for my DSTV and it should have been 750.00. I only realised it yesterday. I phoned DSTV today for a refund and the answer was that it will take 7 to 14 days. If we pay 1 day late you disconnect the service but I have to wait two weeks for my money. This is unacceptable it is not a few hundred rands error but a few thousand. I realise that it was my error but surely somebody knows how to fast track and give some service for a change. I want my money in 24 hours can't see why it will take 14 days will you give me interest on the credit seeing that you surely take interest on dt.