Miway refuses to cancel car insurance for loyal customer

I have had miway insurance for my car since 2016. But now I want to cancel the insurance since I do not need the insurance anymore. However, they do not want to end my insurance. They are busy telling me that their retention department wants to talk to me or contact me. In the cover letter of my insurance policy it is said I just email their customer service and I can have my insurance cancelled with immediate effect. But now they are dragging my case, I have been trying to cancel it since 04 January 2024 and been emailing several times. This is not fair because they will want me to pay for something I do not want. Furthermore, I have a sensitive urgent family situation, it is unfair to be going through this unnecessary situation. I have been a good customer so far and this is how I am being treated as loyal customer. If I knew I should have joined with another insurance company. This behavior is exactly the same reason I am leaving them. My friends have better experiences at other companies. I regret having car insurance with miway. They making my life miserable!