06Orangels

My car has just under 50,000 and my cat is already bad and I'm working on my second o2 censor.. But when i took it to the dealer the first time they told me that they couldnt read the code right because of the intake.So he told me to take it home and put the factory back in so I did..Then I took it back and he read the code again and they said it was a update on the computer.. Charged me $60 and rest set the light.. About 8 hours later the light come on again so I took back the next day and they told me that they had to order a new cat.. and o2 censor..So should I be throwing a fit about the update and my $60??