DStv price lock charges

I app**** for a DSTV price lock explora but I noticed that monthly they were deducting more than the R949 that was in the contract and not on the 15th like I requested. I now changed debit order to cash payment. So I will pay via FNB then use their online system to transfer money to the the price plan. But I noticed that every monthly what is required is still more than what I agreed to pay. January I paid twice in a month as the they deactivated my account saying I'm owing them. Come February I paid R1700 as that was what I was owed. Ever since then I'm paying more than what required. Now I just called as my account was deactivated again. On enquiring I found out after deducting R1149 July debit order yet again as I never changed to it again they say on their system they received R800 asking what happened to the other balance I'm told that I was owing on my old DSTV account that I don't even know what they are talking about. Since beginning of the year I've been complaining about this problem with no solution. Ref for the call is ********** 2/IQ63 and my dstv account number is ********** 2. Miss NR Moduka ********** 912 I would appreciate to know where the entire extra amount of money where going through. Even now when I call to check my balance it says I'm owing +- R2000 yesterday when I called consultant said I must pay R949 plus R50 reconnection fee but when I called today I'm told to pay R1193,67 and when I enquired why is that the consultant couldn't answer then when I told her what the other one yesterday said she checked computer then said I must actually pay R1098. I need them to calculate from when o started the price lock to update how much I have paid this far and see what really am I owing and the errors on their side as I've got bank statements as proof should it be required