Lack of after sales service from Vodacom!!!!

I have been a loyal vodacomcustomer for 16 years, on my last attempt to cancel my data contact i could not do it in store, i had to contact the cancellations department, i spoke to a lady named Mamsy, who was very unhelpful and refused to cancel my contract, i initially payed 262 pm , but after my contract ended i was charged 867.31 for a 20 gig contract. Mamsy was refusing to cancel this contact. I have been trying to cancel the contract since 1.11.18 to no avail and was given the run around and ive called every day to try to sort this problem, ive even called the accounts department wherby i was informed my bill will be reveresed and i have to check within 48 hours, my total bill is now 1349.00. All vodacom says is that they reserve the right to charge you the full amount after the contract expires, but how hard is it to cancel a contract, i will never recommend vodacom to anyone. It is now 19.11.18 and i am still waiting on a response and the frustrating part is i have to pay this unwanted bill otherwise it will have a negative effect on my credit rating. Candice Alexander ********** 644