Infinite support loop, no one taking responsibility for false flagging of listing as restricted product

Looking for a mod who can help break the endless seller support loop, our case number is 10859573362.

Our top-selling ASIN was unceremoniously deleted from Amazon, with the claim being that it was a restricted product. No information was provided except:

"The sale of these products is not permitted on Amazon.co.uk. We leveraged a combination of automated means to identify this issue and to make this decision."

We have sold this ASIN for 7 years. Our other ASIN exactly like this one has not been removed. Competitor listings have not been removed. No one at Amazon could say how the product violated the restricted product category, but eventually we were requested by seller support to remove a certain keyword from the title, despite this keyword being present in dozens of other listings including one of our own. We did so, but the title would only update in the back-end, so we've had to delete it and will relist once 24 hours have passed.

We have been looking to sign up to the SAS program and have been in contact with an agent there who helpfully looked into this issue for us. She found that another consultant listed the same type of product with the same keyword and had no problems, so said it seems to be a seller support issue. One team got back to her and said 'this issue needs further investigation, please ask the seller to call the account health team'. When they had no idea what to do, they transferred us to seller support, who transferred us to the feeds team, who transferred us to the restricted products team via email, who sent the same generic automated response.

Please help, this has completely shut down our business since we primarily sell on this platform.