Utilizing the Binance Accelerator is an option, but at $140 USD, it's not practical for me, especially for a relatively small amount like $1500 USD.
Have you tried estimating the costs of accelerating the transaction using mempool accelerator service[1]? They have executed 853 requestes with a success rate of 91.56 %, but something tells me - judging by the numbers - that they may be restricting the number of transactions to approve (considering that the service is in beta stage, perhaps that is wise). I guess that it doesn't hurt trying at least...
[1]
https://mempool.space/acceleration