Is there anything i can do with my car? PLEASE HELP!?

I bought a used car Suzuki Verona 2004 from a used dealer.. after about a month i started having loads of issues..I called the dealer on his cell.. and he continued to brush me off... months went by and i continued to take the car for repair.. ive repaired and replaced almost every part in this car.. from the converters to sensors to anything you name it i replaced it.. then i came across the lemon law.. and apparently i was told it to late to claim lemon law.. so one day the ignition switch went.. finally! i could not turn the car over.. some one said just take it to suzuki and let them deal with it.. upon making this decision whether or not to pay top dollar.. i did... i went to suzuki and they said HEY! we might just be able to help i told them all the issues ive dealt with this car.. from driving on the highway and the car turning off going 70MPH! then throwing it into Neutral and starting it up! oh did i mention drive while doing it AT 70 MPH! anyway.. they called me up after looking at the car and said well the housing is cracked and the car was loosing pressure.. now.. they said we have good news and bad news ..good news we can replace your engine with a brandy new one! free of charge Covered under warranty..Bad new we will have your car for a couple of weeks,, so i got the car back and ive been having issues with it still ! ive brought it back now at least 4-5 times and today i went to get it and i drove 300 yards and the car still had the same issues! i drove back into the lot and said guys! its not fixed the shop foreman took a lil test drive and says OH! i see what you mean.. well ladies and gentlemen.. what happens if they cant fix it? Does suzuki give me another car? they should be held responsible for this mess and there crappy cars! This is not fair! ive spent thousands of dollars.. PLEASE HELP ME! What happens if they cant fix it!? There has to be something im from nj,,, they put a new engine in and aren't they responsible for this they told me it would run right! im 24 and ive been screwed....