NHTSA Complaint #11419105 — 2009 FORD FUSION

In December 2019, a recall was issued for the HCU of the ABS system that my 2009 Ford Fusion is included in. (Manufacturer Recall Number19S54 NHTSA Recall Number19V904). My local Ford dealer stated that parts weren't yet available when we called, and once the pandemic started, I figured it would take even longer for them to be available. At that time, I hadn't had any issues with the HCU or ABS. However, since the recall, I've had two incidents that have taken place, both of which were EXACTLY as described in this recall: -In January 2021, I was driving home from work, and as I was coming up to a yield sign and began pressing on the brake, I had to press my foot all the way to the floor for the car to even begin stopping. This happened out of nowhere, and from then on I experienced a low brake pedal-I couldn't stop without the brake pedal being extended all the way to the floor. I took it to my local Ford dealer and explained that it's exactly as the recall states. They repeatedly assured me that it wasn't the recall, but the master cylinder, and charged me over $500 to replace. I was surprised, as what I experienced was exactly in line with the recall. -The car drove ok for awhile after this repair, but in May 2021 (just a few weeks ago), I experienced the exact same situation again, and am currently awaiting another appointment, as I once again have low brake pedal and can't stop without extending it all the way to the floor. I can't drive my vehicle in this condition-it is completely unsafe for both myself and other motorists, as my ability to brake is again compromised. I hope that the Ford dealer was honest the first time around, as my issue is EXACTLY what was described with the HCU of the ABS system per the recall notice, and not the master cylinder. (Which would be impossible now, anyway, as they replaced it previously.) If the issue is now diagnosed as the HCU recall, how do I go about getting refunded for the unnecessary master cylinder repair?