What is the process of obtaining a commercial license after revocation?
If your pilot's certificate was definitely revoked then it's gone for good. You'll have to reapply and re-qualify for all your certificates and ratings again, although you have to wait a year first per 14 CFR 61.13(d)(2):

Unless otherwise authorized by the Administrator, a person whose
pilot, flight instructor, or ground instructor certificate has been
revoked may not apply for any certificate, rating, or authorization
for 1 year after the date of revocation.

Certificate revocation is the FAA's 'nuclear option' and they don't do it lightly. Your best option here is to contact AOPA (if you're a member) and/or an aviation lawyer for specific advice.