This is part of the letter in question:

You’ll note that they use the word “Proposed” a lot. They also say that this is’t a bill, which it isn’t, but, if I don’t reach out to discuss and argue against it, the interest will continue to compile and I WILL receive a bill. Fortunately I was able to get thru on my first phone call attempt. So in 18 days I’ll be able to plead my case.