****** Vodacom

So last year I cancelled my contract with Vodacom, they sent me a quote with the amount needed to cancel that contract. I paid that amount and I sent through proof of payment now 7 months down the line apparently I owe them money excuse me ? To even show that I’m not with them when I call them my number doesn’t register on self help !!! I’ve spoken to two ladies who were of no help blaming the other department for not doing what they were supposed to but I’m still stuck with an amount that could get me blacklisted because someone didn’t do their job ... now I’m sitting with a dilemma and no one to help me !! Trust I will not pay that amount it’s not my fault they failed honestly