Messed up Billing. Un-professional

Such messed up billing system, that not only takes away from my pocket but also inconveniences me and my kids. I am so unhappy with dstv, specifically price lock team, that doesn't even have email or contact number. I have called numerous times to query my billing and to be reconnected, but dstv keeps running a bill for services not even rendered. May i paid R1400 as i was told my price lock is cancelled. okay, June, i was billed over R800 for what. Fine now July im owing over R700 for what exactly when my pricelock is cancelled. Now we are without channels, again, i have to explain to my 10 year old why and what happened. I requested my matter to be escalated to someone who will go through my billng and explain to me, how did i get there, no one called me, no one assisted.