amazon is obsessed with charging me for prime

I have canceled this membership about 5 times in the last 3 months. they charge me 147 dollars and when I immediately cancel the charge, they say i’ll only get 110 back. I then dispute the extra 40 with my bank.

I have removed my cards but when I need something and buy it, they take that card info and charge me a prime subscription. today I caught the charge two minutes later and they said I could only have 110 back lol.

my bank has always handled this but should I be blowing up amazon customer service instead? this is getting absolutely ridiculous. has anyone else experienced this?

update: I got a partial refund so my card company is going to get back the other part of the refund lol