Dstv false advertising breach of sla

My fiance signed up for the compact stream black Friday special from R299, the first month we paid R299 and that's where the terrible service started.. the next month we were billed R499.. we called and logged multiple complaints and each time we were told it would be sorted..then we ended up paying R434 and were told we would get a refund which never happened.. to this day they are still billing her R369.. we were told the special never existed..so we sent them screen shots.. no apology but told it would be sorted.. we called multiple times and each time we are either disconnected or they just put the phone down..their live chat us useless as they can't do anything..we are now I'm February and we are still waiting for our refund and the bill to be corrected.. I have contacted legal wise to lodge false advertising and breach of contract.. dstv is the worst I've ever dealt with..they do not care about their customer's only receiving money.. I so wish the competition commison could get rid of their monopoly on sports ! Terrible customer service ! And to this date not one satisfactory response from them