Hi new here... i drive a 2019 Ford Fiesta SE

My name is Vinny and I just relocated to GA from NY I'm 28 with 2 kid's and a wife and when I came to GA i bought my "Little Blue" ford fiesta from somebody who kind of screwed me and the camshaft broke free within a month so when I informed them of what happened to the car they swore up and down that they were sorry and that they will fix it with an engine swap and that it will just be 2 days and I can get my car back however 2 days turned into 2 months and they decided to upcharge me for way more than the agreed upon amount and now my car came back to me with more codes showing a misfire in cylinder 1 & 4 and making like a breathing sound also now my brakes are getting like "puffed up" and lock (sorry I don't know how to describe it other than the brakes feel like there is a big balloon that is blowing up stopping me from pressing the brake after driving it for a long time) I don't know what to do or where to start and my dad who is back in NY always praised the ford forums so I figured I'd give it a shot myself

Any and all help would be fantastic... my dad used to be the one person who I would go to for this