Poor service

I have a fibre business account with Cell C. On the 31st January this year I called them to inform them the account changes. I was to email a copy of my ID, CIPC docs, proof of address and proof of my banking account to *** and I got an automated response and a case number ***. I called them again on the 18 March 2022 and I was told that I have emailed the docs to a wrong address and told to email to *** which I did and I got an automated email with a case number Case number: ***. This morning my Wi-Fi was not working and I called Cell C again. I was transferred to 3 people and told that I was suppose to send the documents to ***. This is the worst service ever. 3 months of trying to get them to change the banking details and today my account has been suspended. I run a small business and without working fibre we cannot work.