DSTV PAYMENT NOT REFLECTING ON PRICE LOCK ACCOUNT

In 2016 I contacted multichoice for the price lock that they advertised on television and they sent me the PVR and it was installed with the telephonically debit order that permission was granted to debit my account with +_ R750 monthly, this however did not happen and I did not notice that I was falling behind with my account. Multichoice the cut my decoder and then we realized that the debit order did not went through as agreed. After various complaints (Also on Hellopeter) multichoice gave me discount as the fault was on their side. All went well and payments was made by EFT and every month I paid more that I was supposed to pay. As from December 2017 multichoise keep on cutting my decoder and then I must spend hours on the phone to get my decoder connected again. Tonight again my decoder was cut and I phoned multichoice again and e-mail the proof of payment again to the lady assisting me. According to her she can not see all the payments of my account (Amount of R4000) does not reflect. After holding 33 minutes and 50 seconds it was agreed to activate my account as she will upload my proof of payment to the account department. During January i received various sms's from multichoice that stated other amounts that I must pay and i did not agree to those amounts. My price lock will end January 2018 and they called me and offered me another price lock amount with insurance that will cost me +_ R850 a month and this will be done by debit order on the 1st of every month for the next 24 months. But now I am worried that multichoice just cut of decoders if payments was done as per proof e-mailed to them. Now I need to know will I have the same problem on the new price lock that was offered to me? CAN I CANCEL MY ACOUNT AS THE SERVICE FROM MULTICHOICE ARE VERY POOR? Please help that i can sort out my problem with multichoise. I will never recommend any one to take out a account from multichoice