Shocking bad service

I bought my dstv decoder had it a few months and it broke, I tried to get dstv out a number of times but had no success. Then I decided to cancel in April, only realizing that that have debited me 3 months after cancellation I phoned in and it was never cancelled from dstv's side. Phoning a number of consultants getting reference number after reference number up until today with NO success. Ref: ********** 0/I76 the last call I made in October the 2nd with no luck once again. I get told that the refund will be paid in 7 days it has been 7 months!!!!!!!!!!!!!!! Ref : ********** /I81 my call today 1Dec 2017... Saying 7 days again.... Absolute shocking **** service from dstv a disgrace!!!!!