Contract paid in full...

its exhausting to have to do this, but i suppose this is the only way to get it right. My phone contract came to an end in November 2020. Knowing this, i called before the contract ended and stated very clearly that i do not want to renew my contract . This was recorded as all calls are recorded. I noticed that my account was still debited. Called them to say i already asked that my account number become pre paid as i dont want to continue with the contract. The debiting continued and i eventually loaded a stop order. Mind you i was called by Vodacom to say that they will refund me as they have debited me for 3 months, and that my number will become pre paid. My number eventually became pre paid, but hey , guess what , i got a letter from a collections /attorneys to threaten me with legal action, putting my name on itc bureau because i owe Vodacom.... and i am in arrears. LOL. so how do you become in arrears when you contract has come to an end ... and you have been paying the full two years. ? your account is already pre paid. ???? what a waste of energy and my mental state and my efforts to do all this just to get justice or to be dragged to and fro to proof that i owe you nothing. If anything you owe me, you stole from me... accusing me of owing you money, when in fact, i paid your contract in full, secondly **********ly debiting my account , as i only gave you authority until the contract is paid in full to debit my account... this was honoured, so who do you think you are to carry on debiting my account??? then where and when did i agree for you to continue debiting me for a phone that i have paid off already for two years, now you charging me the same amount for your service that you charged me for the phone and the service?? then i told you i am unemployed, where did you see my financials that you know that i can continue this contract, how do you give an unemployed person credit .. how reckless is that ? so now you want to put my name on a blacklist?? what have i done wrong ???? How , please tell me how do you get to this???? deformation, ***** , reckless lending .... Vodacom , please explain this one to me