my account get billed because of their mistakes

I went to multichoice where they activated my dstv acc on the 14/08/2015 and i had to pay R107 ,i took family package for R199 but it was already middle month thats why i only paid R107 then i asked the consultants if they can debit my bank account and he said yes because it will be better then i don't have to go to places to pay my dstv acc so he gave me forms to fill in,then on the 1st September they suspended my dstv acc and i phone multichoice and asked why,the consultant told me they cant activate the debit order until i bring them a bank statement and copy of my id so i told her but the consultant who helped me at multichoice didn't ask for that documentation so i said cancel the debit order i will pay cash she told me my account is due only R185 and afterwards R199 every month end so i paid it on 02/09/2015 and they reconnect my account then on 25/09/2015 i made my next payment and on 29/10/2015 my payment again but on 31/10/2015 my dstv acc was suspended again so i emailed them and they told me to send my proof of payment because payment does not reflect by them i send my proof of payment and they reconnect my account now they billing me for the mistakes they did