Incorrect debit

i called multichoice johannesburg offices in december 2015 to enquire if i can make an earlier payment for December debit premium. The agent confirmed that i can make payment and further advised tthere will be no debit order for December. I paid in R320.00 on 15/12/2015, two days later a debit of R297.73 went off from my account on 17/12/2015. Called again on 29/12/2015 to enquire i was advised it was the previous consultants error and i can have the R297.33 debit reversed from the bank. My bank confirmed they wont be able to and multichoice needs to refund me. I called again today and i spoke to a helpful consultant by name of Tsholofelo and she advised me that the refund will take 5-7 days for the refund but my debit order will still go off on 17/01/2016 for the exact amount. I never asked my debit date to be changed from 20th to the 17th &i cant reverse the debit and i was not a fault for your errors. This has caused me an inconvenience and it was irresponsible from your agents not to advise me of this. I expect this error to be fixed and my money credited without any hiccups and delays. further more please cancel any future debits i cannot stand HORRIBLE SERVICE!