Charges added to Edgars account after giving instruction to close account

I paid my Edgar's account in full on 1 November 2020. On the 2 November 2020 I phone to cancel my account and club. I am told it take 30 days to close. I phone today 20 November 2020 to hear the progress on the account to be told there is charges that needs to be paid before they can close the account, yet I paid the FULL BALANCE AMOUNT on the 1st. Changes are added to accounts between the 7 and 10th of each month, and I closed it on the 2nd.

So is the 30 days wait so Edgars can ensure they can add more charges to accounts and try and make more money to help a company that has gone bankrupt.