Update: Mercatox banned me from chat after reporting
If you're also not banned from email live support, you can try to apply for withdrawal cancellation with the help of the exchange support instead of you insisting on getting doge but will be in the queue indefinitely.
Asking them to pay with another coin feels a bit inconvenient.
I already did that, I demanded a position from the financial department. I said I would accept 0.5 btc on the 11th which was the market value of doge. The guy told me to sell on the website, however that is not possible, as selling at market value is blocked. I informed the impossibility and he informed me to wait for the maintenance..
He said he would pay 10X the fee of 50 doge and they denied it, he said he would pay 100X the fee amount and they denied it .. There is no solution ..