I see. So currently, you are waiting for the LoE/LoA/Letter of Nomination - you did apply for a letter of support in the application right? Nevertheless that will not remedy your situation right now, which is your IEC will be expiring before the expected date of getting the nomination.
Unless you get an LMIA, you have no other supporting document which you can use to apply for a work permit. You can chance it by applying for a work permit regardless, relying on implied status and the long processing times for WPs to extend your work status a bit, even if it comes back as refused; you may have come across this as an option. However, this in my view, will be a waste of money in fees and is only a temporary fix; it is dependent on getting the results of the nomination as soon as possible, and before they bring back a decision on your WP application. There are risks in this track.
A recourse is to apply to extend your stay as a visitor, which does not allow you to continue to work, but allows you to stay in the country while waiting for results of the PNP nomination application. This should be more viable,
....In any case, whatever you decide on - good luck on the application. I do hope you find a quick fix for this.
.../atb