Not a cracked manifold now I don't know what to do

What is your question?

I was 99% sure I had a cracked manifold which was causing my 02 sensors to code as bad. Took to a reputable exhaust specialist and says there are no exhaust leaks . But after that took back to shop and engine light was on and code said another sensor was bad..had it replaced this is the 4th sensor that has been replaced mopar only as per repair people. Within 24 hours the engine light came back on and was coding the same sensor that had just been replaced...the jeep still runs rough especially at idle and reverse...still has a diesel sound ..I don't know what to do now don't trust anyone. I have had so many unnecessary repairs done by the dealer and 2 other shops..could this be electrical or fuses or something like that...do you think because I'm female they keep messing with me, keep talking about getting deep in my engine although the engine sounds OK especially at higher speeds seems to run OK. There are no other codes other than 02 sensors...this Jeep has 59,000 miles on it and has been well taken care of have never had an engine light or sensor problem until this past fall.....I really can't afford to just throw it away and thought I would get at least 2 more years out of it. Just put brand new tires on it in Sept. still has nubbies on them Please Help me the dealer here is not trustworthy have heard many people say this..why in the world are the sensors going crazy???