We applied on Dec 16, 2022, and our upcoming ceremony was cancelled on Aug 30, 2023, 7 days before the ceremony date. The USA job offer letter helped us a lot in January 2024. We also gave through WebForm a detailed explanation why it is important for us to get our application expedited. I submitted through WebForm first, and my immigration consultant made an explanation. Then IRCC notified me that this letter was put in queue to be reviewed by an officer. Unfortunately, during 1 month and 1 week there was no action on part of IRCC. I contacted my MP regarding this and she contacted IRCC about 4 times to ask about the status of the review. We also sent the copy of the letter by regular mail to Scarborough office. I also sent it by e-mail to Scarborough office. We also went to Scarborough to talk in person but could not meet with anyone apart from a security guy. There was no any action. Finally, when it was 1 month before the expiration of the offer, my MP raised a ticket and escalated the case. She said the officer was "unwilling" to do so as the application was "non-routine and with no processing times" (BS!!! Always say so, on no grounds apparently) but she insisted saying that the expiration date is nearing. 2 days after the escalation we got the new date (Feb 5 2024). About 10 hours before we got it I also wrote to Marc Miller (I do not know if it really helped). That's the story.