CELL C WORST SERVICE EVER!!!

I am so disappointed with Cell C. I requested for a settlement amount to cancel my contract which was due in January because they were nolonger debuting my account. I was doing EFT cos every time I called they would tell me my account is up to date or in advance. I paid in the settlement amount in October, when I called in November I was told I'm owing an amount and I paid it and requested a paid up letter. I never received one. Early December when I check my credit profile it says I'm in errears, I called and sent emails and no one is explaining how am I in arrears. I received an email from the collections department saying they can't give me a paid up letter as I am owing R53. 20 I must pay and email proof.. That was on 22 December I asked how come cos no one notified me and I've been calling and calling your customer service and you have my banking details why not debit? I decided you know what, let me pay.. I paid that amount and sent the proof. I even called today cos they promised to get back to me on the 24th of December today it's the 28th. Now on my credit profile it shows R125, how I don't know. I stopped using the Sim card in October when I thought it's settled and closed. I just need a paid up letter so that I can fix my credit profile. I am done with cell C. I will never recommend it to anyone. You did me bad. I'm done. I just want a paid up letter.