If your funds are being held. you could put your site on 'time away' until this is sorted out.

Obviously, only Ebay can sort out your issue.  It might be worth submitting the documents they asked for again, making sure all scans etc. are clear and complete.

One issue is that you are trading (buying to sell) using a private account.

You are not paying Ebay selling fees and, with a 'no returns' policy, you are denying your buyers their consumer rights.

Maybe when your current issues are sorted, you should change to a business account and trade legally.