I recently deposited some bitcoin at Netbet and placed a bet which won, but it has been a slog to try and get my money. first of the will accept bitcoin within 10 mins but if you win you can only withdraw via wire transfer which takes 8-10 working days..... what a joke
You should have looked at this (withdrawal options)
https://help.netbet.co.uk/en/sport/contact_us#cont1727 before depositing anything there.
They are just accepting bitcoin using third party bitpay
https://blog.bitpay.com/netbet-accepts-bitcoin/ and they don't have bitcoin withdrawal option.
I think you can try skrill or neteller if you have account in them which may get processed within few days.