Contract problem and legal action

I don't normally write bad reviews for companies but I have had enough, I have been trying to sort out my cancelled contract for months now, they deducted an extra device payment off my account of R1053 I called in to get a refund multiple times they escalated it and said it should pay out in 7-14 working days.

After this I still haven't received a refund and reversed the debit order, they contacted me and said I now owe R1153, I said this is incorrect stating I logged a call the contract is cancelled the last payment was supposed to be in July but they deducted an extra payment in August.

I now received a letter stating that I have been handed over to HP attorneys, Although the account was supposed to be cancelled and paid up I am now in arrears.

This is affecting me credit score and putting me in bad light, when I try to call vodacom I get a message that my number is blocked for calling too many times.

Every time I try to fix the problem I speak to someone and they say it was escalated but I am not getting anywhere.

VODACOM WAKE THE F**K UP!!! FIX YOUR TEAM