Are you turning it the right way?
I’m asking because I’ve seen circumstances where everyone was convinced that it needed to go one way, but many expensive hours later were proven to be wrong.
Also, is there something jammed in the pipe, like say roots or a snake?
Based on the various draconian terms and conditions I’ve seen on my search for a solution I’d be surprised if this was driven by Etsy. In my opinion this is much more likely to be caused by its payment processor.