Treating Customer Unfairly

I have been receiving bad service with Vodacom, I end up taking decision to pay off their contract and stop using them, I am ready to change my number and use other network provider, Vodacom has been mistreating me from top management down to their staff, according to them and their staff they are always right even if they are affecting customer, they have compromised my credit profile due to their mistake and they incorrectly put me in arrears, I complained and all they say they have resolved it but they don’t remove their listing on credit Bureau, the first line when I settle I was told that I was not suppose to settle while their invoice is out for debit order and I was charged twice, then now due to their poor service to me I decided to pay off the other account, I requested settlement quote last week, and I decided to wait for them to debit my scoping on friday, the debit order went of last week friday, this week I requested settlement letter they gave me settlement letter which is the same as before they debit, the amount didn’t change but they debited, I call them and the consultant said nothing is gonna change you have to pay it like that, and I said even when you debit he said yes. I went to Vodacom Mall of Africa and pay settlement amount, the consultant at mall of Africa when he has to email documents with proof of payment he found out that my settlement quote request was cancelled and he said when is like this even when we send documents they not going to cancel it the status says cancelled is supposed to say in progress. The consultant call their head office and they tell him to send them even if is like that. Now I have never receive any confirmation to show that account is closed, I am trying to call Vodacom to find out and am finding out that Vodacom block my number so that I must not call them, I paid the account now am blocked, can they just give me prove to show that account is closed even though I paid extra that they are refuskk I nga to rectify, I just want prove in writing then I will change to the other network provider, Vodacom their thank you is to block me after receiving my money.