Well I only ordered from within countries where I have a good warranty and they pay postage, and only from Amazon or Soundcore, I take photos when new of serial number, I photo and write up a failure having used forums like this to see if any tips from others.
The return of my last unit which was Frames was different, they sent me a return code and I printed a label at local store. Before that I posted back and sent photo of receipt and they credited me. The return methods differ but have always been fair and fast.
I also recommend same to others.
The only bad customer experiences seem to be AliExpress as you have to pay to post back or get some partial credit.
Anyone in support who look at my email history would see returns done correctly.