Cancel of my diseased husband Cell C contract

Good day. Today I just gave up. My husband passed away more than 5 years ago. (Id ***5) . Had a contract with Cell C. Which i tried to cancel since then. After lots of calls and emails, also send my diseased husbands documentation, i stil receive bills every month which i pay, even if i dont use the phone any more.i just want to cancel the contract and change it to pay as you go. December 2023 i paid the outanding balance( even if we dont use the phone) . Then in January 2024 i received another bill. After i phoned and explained several times the situation. This morning they transfered me from collections to client service and a 3rd department. Im realy tired now. And still not have a selution.. i struggle now for years just to cancel and change the number topay as you go. It is difficult to go every time through a heart brake to tell my story over abd over. Hello Peter. You are my only and last hope the gelp. Thank you