2006 FORD F250 SD User Comment / Complaint

I have a new 2006 ford f-250 sd diesel 6.0l. the first year i owned it 7,000 miles i blew a head gasket. it took ford more than 5 weeks to fix it and 2 different dealerships of hassle. 6 months later the problem has happened again. i spoke with ford they gave me an appointment 1 month after i called to set the appointment. after that month dealership took 4 weeks of my time with my truck and didn't fix a thing. told me they were to busy to deal with me and i should take it to another dealership to get fixed. got ford customer relations involved and they have done nothing. i now have my "unfixed" truck in my driveway with another appointment 2 weeks away and that dealership says it will be some time before they can get to it. no customer service plus they haven't offered me any money for car rental fees nothing.please advise