@Anon8 you’ll have to fill out the Wallet unlinking request form
Instructions on how to get some of the information they request can be found at Unable to re-verify wallet - #118 by Mattches
Also want to advise you, response time varies and can take weeks, especially with the large amount of requests and issues happening now (including how some countries/regions no longer are being supported on Uphold and all).
Hopefully they get to you quick, but know that worst case scenario it might be a few weeks.