Contract still not cancelled

I sent a request to cancel my contract with Supersonic on the 11.10.2022, again on the 17.10.2022 both with autoreplies received, with nothing being done after I sent this on their whatsapp channel, Crescentia told me it was not received. I therefore sent it to her again on the 26.10.2022. to this day it has not been cancelled. They called me once and I missed the call but after that one attempt no other calls received. yesterday I received a billing email from them. I am most unhappy as I logged my request more than a month ago, they have had two month ends to sort this but have not. I will not be paying for this.