Not Accepting Applications to Sell after 4 Years Selling Product

As the title suggests, we have sold a product for the last 4 years and have recently had all variations removed and made inactive, now having to request approval to sell. The thing is, the applications have been closed and we are unable to do this.

We sell the same product in the US/EU etc without issue.

There are still cheap, Chinese sellers selling imitation’s of our products and they haven’t been affected.

Seller Support are no help at all.

Any advice greatly appreciated.