Account System Cellc

Once again cellc has let down a long standing customer. I have been with them since they started. I went into there branch in Pinetown to upgrade my phone and was attended to by a very helpful lady. When she went onto the system it showed that I had no status, meaning I could not upgrade. She then checked and found that there was an oustanding amount de my me in October 2021 nd until this amount was paid i could not upgrade. My argument is i had never received an account for this amount. So how was I to know that it was outstanding. I have paid the amount and must now wait 24hrs for this toshow on cellc side. Something is drastically wrong with theire account system and now I must wait. Very unhappy customer