Vodacom Insurance Does Not Want To Refund me.

I have cancelles my insurance with Vodaocm in July 2020. For the next few months they have been taking money from my account. I called in to let them know I had it cancelled and want my money refunded. It's now January and am still waiting on my credit. Each time I call in they say they have a backlog. Or they can't reach the credit department for my refund. I am so tired of this already. When u ask to speak to someone else like a team leader or anyone who can assist then they drop the call. They have no respect and always put u on hold for forever. U don't know if you still on the line coz it's just blank. They really need to learn about customer service as theirs really sucks. I want my money back please. I am tired of wasting my time phoning you guys and no one has answers.