Multichoice Incorrectly debiting my account

I had a debit order of over R800 in Sept and mind you i was on R749 price lock. I called and nobody got back to me. On the 19th of Nov i received an SMS that R909 was going to be debited from my account. I called in and i was told that it was the amount before the discount only R749 will be debited. onthe 22nd of Nov R909 was debited. I called a few days later and i was told was query will be escalated. It has been 3 weeks and nothing has been escalated. I called again today spoke to Phindile Zikana who seemed to have no idea about anything and everythin.

I urgently need assistance on the matter