Sony protects itself from customers seeking warranty repairs with 5 tests in a row, some of which are unsolvable[0]. You then get "this wasn't quite right" notification after 5 tests, on logged-in account with valid credit card assigned and billed by Sony, when even one of these captcha tests was broken.
After I did my best to solve 25 tests, I learned that non-warranty support form is equally customer-hostile. When I called them by phone, they told me that filling out the form is the only way to open warranty case.
I went to their physical store and only after hearing magic phrase "full refund", they were interested in doing warranty repair. I went with the refund. Fuck Sony.