How are you eligible for extension? I thought you applied for a work permit? Raise a webform or since you are in Canada, call IRCC on Wednesday to ask about status of your file.
So you are not extending your work permit, you applied for a new work permit since it is a new LMIA with new job. Call IRCC on Wednesday and ask about status of your new work permit.
If you are in Canada, you can call IRCC next week. Google IRCC phone number. You will need all your account information. If through an agent, that it may not be possible if you don’t have authorization.