Cell-C fibre permanently disconnected even though we have paid.

We have had a Cell-C fibre account for a while and for some reason in Feb 2023 the payment method for the account was changed to EFT payment. We have been paying this via a scheduled payment each month. The fibre stopped working today and the call centre inform me that the account has been PERMANENTLY closed due to non-payment. Apparently we need to send them an email every month telling them that we have paid. We had no communication around this. Really annoyed. Apparently the only way to get fibre working again is to apply for a new account with Cell-C, WHICH WE WILL NOT be doing