Never again

I dont understand how some people get treated by business's. My fiance bought a truck from Wapiti Auto Sales In GP and it has not been working for over a month. On top of that the gas tank leaks when we fill up the truck. We were told that the GPS that was installed was not installed correctly and now on more than 1 occasion the truck will stall out and not restart *apparently the security system thinks the truck is being stolen** He has only had it for 2 months. We have offered to bring it back to wapiti to get it fixed. to get rude comments back We are paying for a truck we cannot drive in fear that we will shut it off and not be able to start it AGAIN....The first time it happened we were in a town 2 hours from home and had our 8 yr old nephew. Like so many times before, we were told there was a 12 month unlimited KM warrenty. Now they are trying to get him a different vehicle aand now they want him to pay another $500 down payment on top of the $2000 downpayment he has already paid. towards the truck....WHAT A F"N JOKE.
I have asked my husband to contact BBB, and a lawyer so that is what we are looking into.