Vodacom is a *****

i had two contracts with vodacom, which i have settled last year november,i have send them email with proof of payment, quotations of the two devices, and I.D copy to let them know i am cancelling, this year May i did an upgrade on one of them numbers, it was on my surprised to see them debiting on my bank account all the numbers even the settled one, they say the have escalated to their supervisor and the reference number is ***, i am paying alot of money for something i have already paid for