The grace period granted to employees after visa cancellation

It is 28 days counted from the date of cancelling the work card and not from the date of cancelling the visa.

You must amend your position so that the employer does not make an escape report at the Ministry of Labor as he is legally obligated to remove you from the state.

You have 30 days after the cancellation of the visa to exit the country.

There seems to be an error. Therefore, please go back to your administration department to amend the date of exit.