I am very sorry to hear the bad news. There may be some options available to you, as the denial may put you out-of-status immediately.
1) The denial may be reopened/appealed using form I-290B by filing with the USCIS, with information that may overcome the reasons for denial. However, the motion to reopen/appeal may take up to 1 year. Unless, you have solid evidence to back-up your case, there is no point. If there is good evidence, the response for Appeal may be under 1-2 months.
2) Now, your Employer will receive a detailed notice explaining the grounds for denial
3) Employer may IMMEDIATELY reapply for another extension, covering the items in denial (depends) It is important to note that the denial may have also directed you to leave the country as you may be out-of-status. Please note that if your previous H1B has expired, you may not be eligible to legally work. This is very sensitive and you MUST act quickly to avoid jeopardizing your career/status. Please provide more information for the following:
- Do you still have the previous H1B I-94 valid or expired?
- Do you know the reason for denial?
- Most likely they issued an RFE before denying the petition, do you have any information on what was requested in RFE?
- Do you have a valid H1B visa stamped on your passport?