Bad service , no reply

On the 4/06/2025 my fibre was not working. I contacted Home Connect but they were unavailable at 4.45pm. I thought maybe they blocked my account because I updated my banking details and gave one months notice to terminate my service. On the app it should that I owed for the month of June 2025 despite my account been debited. I made an eft payment. I requested several times that the accounts dept refund me. I received notification that my balance is nil . What about my credit. Until today they have not responded