Harrasment from Edgards

I keep getting text messages from Edgars that my account is in two months arrears of R83.04 after having paid an amount of R4231.00 on the 05/08/20 at 15h34. I than went to their Jabulani branch on the 10th of August 2020 to close the account permanently. I have sent them emails to query outstanding R83.04 and requested that they remove my name and contact permanently on their system in vain. I need assistance to have Edgars lose my contact as I do not owe them a dime.