Gas Recirculation Valve (egr Valve) problems of the 2015 Ford Fiesta

The resivour cap, siezed up first time I was trying to add coolant. It took along time get it off! litterly had to break cap into pieces. And with oem part cap. From the Ford dealership replaced it? in now it's, overheats and no visible coolant leak. And this has been going on for several months. . The motor makes a clacking sounds. The 1. 0 turbocharge 3-cyl turbo is not working properly. Plus it's engine bay fuse box says engine fan is 60 amps in recently I noticed it has had a 40 gage amp. Thank that the under the hood engine fan. Wasn't perform at the recommended fuse. . It also at start up and sitting still at motor bog's down like it's about to cut off. Know the overheat proublem's. If I'm sitting still in neutral and I turn the ac on full-blast it stays at 4 bars which is normal for as long as I want and it doesn't over heat ? but, soon as I put it in 1st gear and try to drive it will overheat, not even going 10ft and I have to turn off the ac and put it on the heat. Full blast! within a few minutes it slowly goes down. But know that it's July if it's anything over 90 degrees outside I have to turn heat on full blast before making it 1-block or it overheats. In I have kept a close watch on the coolant level, and I have watched youtube videos and etc? trying to figure out what's wrong. In all my parts store location don't have any thing for my year make model nothing. I got this car from a dealership a year ago of the month July. In it gets regular oil changes, but I'm lost trying to figure out what is wrong, and what to do about it and others I know of have had same proublem with there's . . And I have to have heat on full hot on 1-2 level in 70 degree weather, and if I get onto the interstate and go to 55-70 mph I turn heat level to 4 full blast and it will still go up to 1 bar away from it telling me that engine is overheated. & at 2500 rpms it overheats! smh.