ACS PRE OWNED bad service

Worst service ever... Upon buying the car it was good but after i bought the car not even a week later my turbo on my car went i told them the problem what part of it is and they said they will pay i ordered parts and now the one problem is fixed but i told them the turbo also went and then all of the sudden they had problems with my trade in saying no there is spray work to be done on my trade in witch i feel they had to inspect the car on the day of trade in not a week later now because of that they wont help me with the car that I bought i have to sort it out self and they saud they will now only pay half of the price on the parts that i ordered ... I talked to Julian said i cant struggle like this we might need to cancel the deal and his words was "Yes please do that" because of my trade in... I have never struggled with a dealer like this before