Dstv rewards voucher still un resolved725192

I accidentally rated DSTV but my query still is not sorted out. The Dstv rewards no one is able to get back to me and I keep getting passed to different departments. I had I rewards vouchers which I opted to exchange for Checkers gift voucher of R100.00 each . One went through and the other stated that it was already used. I supp**** the proof about 4 times, it gets escalated and....still nothing. Very soon they will tell me that it is too late to use it through no fault of mine.I am very sad about the poor level of customer service from the Rewards department.