Probably depends what you need. I’ve used Amazon quite a lot for quite a long time and I’ve never had an issue go unresolved. I guess I’ve also almost never had to talk to a human though, they have pretty well automated just doing whatever the customer wants them to in most cases.

The last time I had to talk to a human (and it was two years ago) was because I accidentally left a fire stick behind in Puerto Rico two years prior and someone bought a few seasons of True Blood with my Amazon credentials. They still refunded me, even though it took me two years to notice the charge.