Horrific after service from We Buy Cars

Bought a range rover 2 months ago. Never got the service record like they promised. Turbo is faulty. They refuse to fix it day I have to use my warranty. Why must I pay? Vehicle 2 months old. Found out vehicle does not have a full service record like the promised. Vehicle was serviced years ago. Also found out engin was replaced after they said no work was done on vehicle. We were **** to. Now they refuse to help me. I have no vehicle. Why must I pay for them lying to us?