If you are desperate, you can try flagpoling to get pgwp issued immediately at the land border. Just make sure you have all documents and answers to the officers questions ready. Also,not all border posts process permits and not on all days...if you do decide to go, make sure you go on right weekday and quite early...their daily quota gets filled fast and they might ask you to come some other day or apply online. I was considering this option if my employer would have been adamant about the permit and didn't accept ircc maintained status guidance.
With flagpoling, the only other thing to note would be that you would have a US entry "administratively denied" in your records...so will have to answer Yes to that question in every visa/immigration form where it asks "have you every been denied entry into any country" but you can mention flagpoling then it's not viewed negatively. If you have US visa then you can always cross over and come back...