Shocking account deductions from Multi choice

I downgraded last week to compact as the premium was much too expensive the assistant assured me it would be debited on the 2nd December an amount of R459 including Showmax and it was also on my app. This morning they deducted R799? I phoned but they said that they understand but I phoned ok it was five days ago but they said unfortunately it had already been loaded, they will just allocate it to January. I said unacceptable and it December a month of expenses. Then today there is apparantly another amount of R4.95 outstanding, this is insult to injury.