This mirrors exactly what happened to me on ebay. I received a very expensive bass from GuitarChimp https://guitarchimp.com. He has a very high feedback rating on eBay and Reverb.
Anyway I got the bass checked over by my guitar tech who provided me a report to say truss rod is not working on a bowed neck. I passed this on to GuitarChimp and raised a case. They offered a refund and said they would send a postage label. It never happened and all went silent for 2 weeks. Then eBay suspended my account and closed the case in his favour, even though I provided them with an official report from my tech. Absolutely no chance of arguing my case. The whole thing has been surreal. I had plenty of positive feedback myself but that didn't matter a jot!
It is clear they protect high volume sellers with good feedback. I went direct to GuitarChimp and he has completely ignored my emails. So I am in the middle of a credit card dispute now.
I love that GuitarChimp are on YouTube promoting their ads but behind that facade is something different.
I find them overpriced and not very friendly.
Awile back they had 2 different Ric 4001's, similar price and same vintage but one had a nicer case than the other. I emailed and asked if we could do a deal that involved the nicer case. I got a "no" as a reply. Nothing more. Stuff like that is a red flag for me. A " I wish we could but unfortunately can not" goes a lot further with me. Some people don't see the big deal but I find it's indicative of the level of concern you'll get if you have an issue