Disgraceful experience at Cell C

Signed up for a contract with Cell C in 2021 was given an extra sim card which I did not request and charged monthly for it,complained to cell c and was advised they will resolved it within 48 hours it's now 2024 and nothing has been resolved and I'm still being charged even though the contract for the extra Sim was suppose to have reached full term. Everytime I call the call center they hang up ,or keep you on hold without a reason and eventually hangs up then I would have to call again wait in the queue for the exact same thing to happen again,Even if I do happen to get ahold of someone to assist and request for a manager they always say manager is busy on another call,so the entire call center has not a single manager available to assist?Today i spoke to another cell c agent who told me they dont have access to view the history of the complaints i need a case number which i never got and hung up on again.I never expected for a well esablished long standing network provider to have such a ********** customer service!!!FYI I'm still being overcharged!!!