I also never heard of it but its also a Bitcoin block explorer, it's surprising that it's not showing on mempool and blockchain.
https://mempool.space/tx/2576526f091b8a283554c463cc3e6ca77c069eef65854141ed0daecf294279c9
https://www.blockchain.com/explorer/search?search=tx%2FBTC%2F2576526f091b8a283554c463cc3e6ca77c069eef65854141ed0daecf294279c9

I can confirm that there's network congestion right now one of my friends took 7 hours before his transaction got one confirmation.

What do you mind it's your deposit and you made a withdrawal do you mean that you did not wage or play on Roobet this is a violation of the casino's wagering requirement, when you deposit you have to play and wage and you can only withdraw based on their wagering requirement.