IMPOSSIBLE TO CONTACT MWEB

I CANCELLED MY EMAIL SERVICE ON 15 MAY 2022. I RECIEVED CONFIRMATION - Ticket reference number - MWB***3 BUT THEY HAVE BEEN CHARGING ME SINCE THEN. I WOULD LIKE A REFUND. ITS IMPOSSIBLE TO GET THROUGH TO THEM AS THEIR HELP LINE REQUIRES AN OTP WHICH IS SENT TO AN OLD CELLPHONE/EMAIL ADDRESS WHICH I NO LONGER HAVE ACCESS TO. THERE IS NO WAY I CAN CONTACT THEM BECAUSE OF THIS STRANGE SYSTEM!!!!