@Lahey1234 When a big amount withdrawal is made, the casino will most likely do a thorough scrutinisation of your account and gameplay, which may take several days to a few weeks - if this is the case, I would suggest give the casino another week or two for their reply.
When a duplicate account accusation has been thrown upon you, then you need to make a complaint right away - you can use AGCCS for this purpose, but please take note that not all similar complaints have been successfully resolved!