CELL C - USELESS

I am so angry I want to sue the white blazes out of Cell C!!! In April 2020 I informed them that I would like to end my contract - they told me to pay end May, pay the outstanding amount on the handset (as on the invoice) and call them 2 days or so later to confirm cancellation - but they would log the cancellation as requested. I did as asked. End June I got an invoice...phoned cancellations and emailed...end July and End August same story!!! In Beginning of October I got hold of a lady who actually cancelled the account! JIPPEEEE, BUT and it is a big one...they now say I owe them R458 . I need to take out a loan for a building and cannot as they have not updated my status and have not taken the amount off. I have gone in to a branch and the very helpful young lady said she would log it and they would get back to me in 24h with a paid up letter (bank wants this) and my status updated with experian..........WOW guess what...NOTHING!!!!! If I cannot get a loan because Cell C did not do their job MONTHS ago, I AM SUEING THEM for the amount I need for my building!!!! I am sooooooo gatvol of these people. Not the first f up from their side!