a person said that they are keeping the money from withdrawing to profit from bitcoin fork. If this is true so when will be this fork and possibly after that they will resume normal withdrawals.
Segwit is canceled if that is what you mean, there is some Bitcoin Gold fork coming up but i don't know the details.
It has happened already:
https://www.coindesk.com/bitcoin-gold-goes-live-bumpy-blockchain-launch/Segwit isn't cancelled at all. Segwit is working since 1 August.
What you mean is Segwit2X from the NYA (New York Agreement) is cancelled, but even that is not completely true:
https://bitcoin2x.org