vodacom is getting on my nerves

Vodacom still hasnt settled my dispute about the tablet contract that i cancelled last year. They have yet again sent me a letter notifying me of legal actions that is going to take place if i do not pay the account (by the way its the account that i cancelled last year). I am fed up and would want everyone to know that vodacom is worst of the worst when it comes to these types of things by the looks of it, this is my second letter on this subject and i will keep on complaining about the weak service of vodacom and i will type another complaint soon if this matter isnt resolved asap.