Comment on H1B Revoked, Withdrawal, Termination – By Employer? USCIS? Oh My! Options by Kumar

Usually it can take few weeks to months. Yes, they will send an acknowledgment receipt. Well, this is the grey area, if they have already revoked, then it can be tough..if not yet done, there may be chances. I would suggest you talk an attorney and act accordingly.

Source: Redbus h1b 1