Changed debit order date, service disconnected

I called multichoice on 10 October to change my debit order account and date to 20th of every month effective immediately, consultant did not notify me that I must make a manual payment at any stage he confirmed R419 or so will be debited on 20th Oct when it did not run thought it would do so end of month which did not happen then thought it would run 20th Nov inclusive. Today on 17 Nov they disconnected my services by saying my account is in arrears whereas i instructed them to debit my account and did no run from responsibility as the consultants told me over the phone. I am not happy with kind of treatment I got as if I am dodging paying my account but the have no problem invoicing an invoice into the future payable immediately which i pay.