Poor service and a complete run around

Since the beginning of January 2022 i have requested my contact details to be updated, to date i have not had any joy. I cannot make use of the app or vitality features because i am unable to get any OTP's to relink my device. Every time i query it i am told the matter has been escalated and i will receive feedback within 48 hours...This never happens If this matter is not resolved and i cannot use what i am paying for i am more than happy to cancel and move to another service provider. Very poor service..