Terrible and disappointing service from Vodacom

Terrible service by Vodacom. Been given the run around for weeks. After giving in my new contract phone for warranty repairs over a month ago, they eventually told me a week ago that it can't be repaired and I've been issued a "credit note" by the vodacom repairs with a reference but no amount. I then was told to go to the vodacom shop to use the reference to get a new device, which I did last Friday but at the store they said there's no amount reflecting on the note and I should come back on Monday. Its now Tuesday and there's still no amount and they have told me that it could only show by Friday. This is pathetic service as I am still paying an extremely high amount for my contract and I don't even have a device to use, and no load device was provided either.