Am I stuck waiting hoping for a refund? Seller threatened me with stopping my shipment

I purchased this collectible from this AliExpress seller and later the seller messaged me asking for $20 because acquiring the item was super expensive.

I paid it on a separate listing and then realized AliExpress doesn’t allow this. The seller says he stopped my shipment and won’t sell to me.

I opened a dispute but still have yet to hear anything back from AliExpress despite showing these exact screenshots for both transactions on their customer service chat.

Am I basically screwed? Anyone ever experience something similar?