I've cancelled several years ago because I rarely buy anything online outside of games so it's just not worth it (also Prime Video's selection sucks ass)
The bastards still try to charge me about 4 times a year and I have to do a charge back with my bank.
Also if I ever have to actually buy something through amazon, even if I specifically tell the fuckers not to add prime to my account, they do it anyway.
Fuck Amazon.