Deceased Estate contract to PAYE (after expiry) ZERO RESPONSE ZERO SERVICE

Have been trying to speak to or be rep**** to an email in which ALL THE information was sent or contacted by Cell C, to cancel a contract for my late father. Per Cell C's automated response they will get back to you in 48 hours if related to an estate.... 14 NOV 2021 to 5 DEC 2022 is NOT 48 hours It is critical for us to keep the number due to contact details that need to remain, and NO ONE WANTS to HELP. The CALL center is USELESS and just says they don't feel with it and can't help. My mom can no longer afford to pay and we will have to request the bank to start reversing the payment, which is THE ONLY TIME CELL C bothers to contact you, if they don't get their money..... This is beyond frustrating... This department can not even be called directly and you have to every time sit on the phone for 30 min just to give up that anyone will answer after being transferred... ZERO customer service!!