Foxton's HQ are within a few miles of my office and the greatest concentration of their business is within the central jersey area, although they are licensed in a few states.
Foxtons currently shows 413 active listings in just one MLS.
The following is not legal advice, but it would how I would handle it. Verify all with your attorney. Foxtons concern will be their "commission" and you might be responsible for paying it. Your attorney can write a sales contract for you. Proceed with your sale. Be prepared for the a possible claim from Foxtons for their commission. At the time of closing, have your attorney advise you of how to proceed. Foxtons offices can only be chaotic today. In just 2 counties, they have 413 active lisitings, and 23 under contract. It will be challenging to get a 'letter' from Foxtons today.
Wrtie out all of your notes today, while the memories are fresh in your mind and can be more accurately reported. Write out your notes about who you spoke with, what was said, dates, times, etc.
Your challenges with Foxtons (not inclusive of today) are commonly expressed complaints by other current and former Foxton clients.