Highly irrate customer!!!!!

I am absolutely disgusted at the service I am receiving at MultiChoice Wow!In July I specifically told them to stop debiting my account as I would be making a cash payment as from August,I lost my job so obviously there would be no funds as of August!!Thinking that they had obviously done this,I was then making cash payments at checkers up until now.Now I normally pay about R1100/1200(paying for 2 decoders on compact plus package) but all of a sudden I now owe them R2800?!!!!To my surprise this morning I wake up and they have now de_activated both my decoders!!Obviously in shock, I call them,franticly,with MY airtime,spent 30 minutes(got screenshot as proof)to ask what's happening as I have never paid such a huge amount before barring in mind that I have never missed any payments so I do not owe then ANYTHING!!The consultant than tells me that the "manager"has advised her that unfortunately they did a mistake on their side and were still debiting my account(which I haven't used for the last 3/4mnths)as a result payments were reversed back etc and now I am supposely owing them this ridiculous amount of R2800!!!Now how on earth would they debit an account which doesn't even have any money and reverse it back??Is this now my fault that MultiChoice has *********** consultants who debit unemployed peoples account after me specifically telling them to no longer debit as I have been making cash payments thus far!!!The nerve of that Manager to tell me to please send slips that show I was making cash payments at checkers than they can reconnect???????Who keeps grocery slips???so am I now suppose to search Bins around South Africa for that slip??on the system it specifically shows that payments were done hence they have never had to disconnect my decoders so what other proof do they need??where am I supposed to get these slips from?must I now request checkers to please forward me slip for the last 3 months showing I paid for DStv?what the hell!!!I am seriously loosing it,and the fact that no one has even gotten back to me with regards to this urgent matter is DISGUSTING!!I now have a 10 year old son who's still on holiday basically looking at a blank TV screen because it's now been disconnected and this is not even my fault!!How dare you guys treat me like this???I would like someone to call me NOW to fix this please!!!! *** Nomfundo Sangweni