Incompetence with payments and account handling

So I have a contract with Cell C for almost a decade now and most recently I went into arrears for about 2 months with my installments i.e. November and December 2023 installments. I then arranged to pay the amount in arrears to the associated bank account ( Nedbank). Cell C didn't allocate the payment and subsequently didn't cancel the debit order so there was duplicate payments which means my account is up to date ( which was also explained to me). I was also told that the only amount that would be deducted on the 25th January is and amount of R380.39. I then requested a refund of what I overpaid and it was paid to me on the 16.01.2024. I thought that was the end of it...I then got countless sms from the 17 - 23 January saying my account is in arrears and that my service would be suspended. I questioned it and was then told that I am in arrears.I then asked why was I refunded if my account is in arrears to which they rep**** that the R380.39 is linked to my number and is in arrears. a few minutes ago my number was suspended and my debit order is meant to go off today. The annoying thing about it is that I recently bought a 7GB Daily bundle where I get 500MB Daytime data and 500MB Night Data Daily. That is lost now because of miscommunication or incompetency when dealing with payments and accounts. I am not inspired to continue with Cell C as a provider because they have shown that communication is not a strength of theirs. It a real shame because the Social Media department is actually very competent and responsive when it comes to handling queries.