Blind Spot Detection problems of the 2018 Honda Accord

Blown head gasket after taking my car in to Honda cars of rock hill SC, I had no issues, only took it to have the fuel injector recall done, they did a diagnostic nothing came up, they did the fuel injector recall repair, and they asked if they could do the oil change I told them yes, a week later, my car lost power on interstate 77n in rock hill south carolina. I was going about 70 mph and it dropped from 70 to 20 mph in a matter of seconds, I had little time to get out the lane, I could have been killed or killed someone else I was terrified. Every known light on my 2018 Honda Accord came on, I have a video of the lights on my dashboard. I had it towed back to Honda cars of rock hill on 5/30/2025 and was told I had a blown head gasket. . . I asked them how, they just put a fuel injector and nothing else was wrong with my car. They told me cost is $5500. 00, I told them there as nothing wrong with my car prior to them doing the recall, matt told me there was nothing I did, so I asked him what did they do to my car, I need them to replace my motor who knows what other damage happened my car had no issues.