One year ago, I had to contact Apple support because the FindMy feature wouldn't work on my Airpods Pro, which still were under warranty. It looked like they were already associated with another account, which wasn't mine. That made no sense as I bought them myself at the Apple store and only have a single iCloud account.
I went to the store and they acknowledged the issue, and immediately got a replacement which turned out to have the exact same issue. I then had to spend hours on the phone with their customer support. After trying everything without success, the person on the phone told me I'd get a call back in one week to either issue a refund or find a different solution.
That phone call never came. All my following messages to that person were ignored. I finally gave up, but found out I was far from being the only one they had ghosted like that. Reading these stories reinforces my belief that Apple is terrible in terms of accountability when something goes wrong.