Pathetic handling of a pensioner

I am utterly disgusted with your customer service. We have been a long term customer for over 25 years. My father who is a pensioner decided to cancel his landline in September 2023 as he could no longer afford the landline. He went to Promenade mall in Mitchell's Plain whereby the staff confirmed his landline is cancelled. Bearing in mind the landline is no longer active. It's a dead ringtone but yet his still been receiving accounts from Telkom since October month. He has been to Telkom on multiple occasions and has received a case number but still been sent bills to pay with no active landline. Please can you explain yourselves expecting a 74 yr old man to go up and down is really ridiculous!!!