What a frustration-Edgars account closure

I payed my account in full on 20 October 2020.I requested that the account should be closed.after continuously contacting the Nimble group which apparently handles my account,I got an email that stated they are sorry for the inconvenience and will attend to my request.I am still waiting.After I eventually got hold of somebody that could help me over the phone-15Dec.-,the lady informed me that I again owe about R80 and if I pay it I will get notification that the account has been closed.On 4January 2021, I contacted them again and the lady informed me that the account is still active with no "note" that states the account must be closed.This is very frustrating as they keep on putting charges on a full payed account and then I must pay everything before they will be willing to close the account and still I must be patient and they are sorry for the inconvenience. Would they accept a "sorry for the inconvenience" if I didn't pay my account when I still owed them money?