timing belt change or not?

:screwy: I once have had a bad timing belt change from a dealer, they left the cover loose and bolts missing and also used the old screw driver trick to turn over the engine to get a new fan belt on that they claimed I needed and the old belt they put in the trunk was cut off to save installation time , a month later my vibration damper came loose on the flywheel pulley from being way to tight and I had to pull the radiator and at lot of bull to fix it myself, bottom line, I change my oil every 3000 with filter IM not harsh on the car , can I let the belt go to 90k.???? the engine is as steady as ever at idle dont want another bad quickie job that who knows if a cigar butt or paper clip was left in the timing cover as well as a hamburger wrapper?

:screwy: I once have had a bad timing belt change from a dealer, they left the cover loose and bolts missing and also used the old screw driver trick to turn over the engine to get a new fan belt on that they claimed I needed and the old belt they put in the trunk was cut off to save installation time , a month later my vibration damper came loose on the flywheel pulley from being way to tight and I had to pull the radiator and at lot of bull to fix it myself, bottom line, I change my oil every 3000 with filter IM not harsh on the car , can I let the belt go to 90k.???? the engine is as steady as ever at idle dont want another bad quickie job that who knows if a cigar butt or paper clip was left in the timing cover as well as a hamburger wrapper?

I'm not sure what changing your oil is supposed to have to do with your timing belt. Did you take it back to the dealer and point to all the stuff they screwed up on?