Front Suspension Coil Spring problems of the 2014 Ford F-250

My 2014 Ford f250 platinum diesel has exhibited death wobble on multiple occasions. I have experienced the issue at different speeds on the highway anywhere from 50 to 70 mph after hitting small bumps in the road. I have taken the truck to blaise alexander Ford on multiple occasions to address the issue. The first time they replaced steering stabilizer and it was worse after I got the truck back, the second time they replaced the tie rods and gave it a front brake job, got the truck back and it was even worse, the third time they replaced the steering gear box. Still no effect on the death wobble issue. I then drove the truck with their mechanic who told me it could be the shocks or the tires or maybe a spring or coil is broken. The truck is unsafe and Ford needs to figure out how to fix it. The truck only has 70,000 miles on it.