Dstv Price Lock Overcharged, poor service

I have been overcharged on my DSTV price lock account for the 2nd month now, poor service from the call centre agents and management, no one can assist me to resolve the problem, I have been calling for the past 4 weeks and the problem is still not resolved and have had no contact in the past 4 weeks from the price lock department and there is no contact number for them, I have been promised feedback from the dstv call centre management and no one to date has kept to they word and contacted me, everytime it’s the same excuse that dstv had upgraded they systems and all price lock customers have been effected, worse customer service, why should the customers have to suffer, from dstv having internal issues