But didn’t you save copies of the final work from which you can rebuild your portfolio? That would be a better way to go anyway since the screen captures, photos or PDFs you create will be different from what they have on record so their image matching algorithms (if that’s what they use) would be unlikely to pick up on it.
Their algorithms might also have picked up on your IP address being the same as that of a recently suspended member. I really don’t know their procedures, but I’ve got to think they’ve automated most everything instead of having people look up this kind of thing on every account. If you head to UpWork through a remote proxy server (which is a fairly inexpensive thing to sign up for), your IP address won’t be traceable and might solve the problem. Then again, they might very well block proxy servers. If you go this route, I’d also use a proxy server in your own country, so they won’t peg your physical address as in a different country from your Internet access. Then there’s also your street address and financial information, which would need to be slightly different too in order to keep them from matching things up. I don’t know, maybe it’s more trouble than it’s worth.
I’m not normally one to suggest ways of getting around these kinds of rules, but I’m not suggesting anything illegal — just possible ways to get around the silly, overly restrictive rules of a company that shortchanges both their designers and their clients at every step of the way.
For what it’s worth, you’re not alone, of course, in looking for work. Lots of designers have been laid off or furloughed due to Covid-19, and the jobs are very scarce right now. That not encouraging, but on the bright side, you’ll have some time off for awhile, which you can try to enjoy as you look for more work.