Wedding day of coordinator cancelled the day before our wedding

Location: Pennsylvania

We got married in the afternoon of Saturday 9/13. In the early morning of Friday 9/12 our day of coordinator sent an email that she was cancelling her event management service due to an "unforeseen personal matter". Most of what was listed as services in the original contract didn't happen because they were in person services for the day of the wedding (providing bathroom baskets, setting up before the ceremony, helping line up and cue the processional, coordinate timing of speeches, cake cutting etc), though she had helped us with the timeline so we did get some service. It was a very stressful 24 hours but thankfully all of our other vendors went above and beyond to still make things run smoothly.

In the original contract it states that in the event of illness or other unforeseen circumstances where the primary contact is unavailable they will make every reasonable effort to find a replacement. Considering that a few days before she said on the phone her assistant would be available should anything happen (she had flaked on another scheduled commitments so I asked) it was quite a surprise when we got the full cancellation email.

She also attached a letter saying that she would refund 50% and at the bottom put a "non disparagement agreement" that stated: as part of this cancellation and refund arrangement, both parties agree to refrain from making any negative or disparaging remarks, written or verbal, about one another in any capacity, including online platforms, social media, or other public forums.

My question is two fold:

1. We are going to try and get all our money back (or at least 75%), and threaten her with either a venmo dispute (we paid as goods and services less than 180 days ago) or small claims court. I think with all the email and text evidence we have we'd have a good case for breach of contract but the total amount of the service was around $950, not sure if it's worth it?

2. If we wait until getting the money back, are we not allowed to write a negative review based on her "non disparagement agreement"? I didn't sign anything to that effect. We definitely want to warn other couples planning their wedding about her.