Amazon blocked one ASIN of my own brand while allowing another, no support at all

I own the brand and created both ASINs myself. One variation (35 oz) is suddenly restricted, while the same product’s 1.1 lbs variation is still active and selling fine. The products are completely identical except for the weight.

Amazon says I need to reapply for category approval, but when I click “Apply to sell”, it says they are not accepting applications for this category at all.

I have sold over 3,000 units of this restricted ASIN in the past two months, and now I have stranded perishable inventory that will expire soon. I opened multiple cases, contacted live support, and even posted on the seller forum — nobody is helping, only telling me to wait or remove inventory.

This is causing serious financial harm and gives an unfair advantage to competitors. Has anyone faced this situation and actually found a way to fix it?