Overcharge for several accounts and wrong monthly subscription fee

I unfortunately miss DSTV consultant's phone call after my complaint. She left a voice message that she will try to call again but up to now nothing. I also filed a complaint on their web but no response and no changes on my overcharges. My account still not corrected. I am waiting in anticipation for their call. I also signed up before 31 March 2018 and was also charged the wrong monthly subscription. as set out on my contract. Poor service.