All of the inputs to THAT transaction look like they're confirmed, so once that big transaction confirms (could take a while with current network congestion and the "low" fee of only 87 sats/byte )... the rest of the transactions will slowly start to confirm. So, there is hope you may get your coins, but it could take a LONG time.
That website looks like it is handling withdrawals in the worst manner possible... It simply uses previous unconfirmed "change" to create a new transaction... and they're making massive chains of unconfirmed transactions
This is honestly my first BTC transaction even though I have spent ages reading about it, but I have never came across this kind of an issue on the internet.
I will update this thread once/if I receive the BTC.
Anyone else who'd have another insight/possibility of outcome, please do not hesitate to reply to this thread as well.