A termination package is an offer, not a statement of your entitlement. Statutory minimums under the Employment Standards Act, 2000 are a floor; common-law reasonable notice is frequently higher.
Some legal claims are subject to strict limitation periods. If you believe you may have a claim, do not delay obtaining legal advice.
This page provides general legal information about Ontario law. It is not legal advice, and reading it does not create a solicitor-client relationship.