Disappointed customer

My contract ended somethime 8m September. I called and asked for it to be canceled. I was then ask if i didnt want to upgrade I said no. Thr told me she would escalate the matter. Till today nothing they've been Debiting every month. Ive called every month since September still nothing. Even last week i called twice still nothing. This is very disappointing off Vodacom since im a loyal customer and ive been with them for 8 years already.