You have 30 days to request an Internal Review. A different adjudicator looks at the exact same file. Spoiler alert: The success rate for IRs is very low (roughly 10%). You are essentially asking the same office to admit they made a mistake.
The exists to provide financial assistance and employment supports to people with disabilities. However, if you have heard horror stories about the application process—the paperwork, the long waits, and the inevitable denial letters—you are not alone. The system is complex, but it is not impossible. apply for odsp
But the alternative is worse.