Car purchase

I bought a car at weelee dealer,but they said the car has problems so I've asked them to repair all the faults on the car witch they invoiced me for on the purchase price... after I took the card there was still issues with the car that they did not mentioned to me... I had to take the car to an diagnostic center and then we found that there is more errors on the vehicle...now they took the car again for diagnostic and now they say there is nothing wrong with the car.... I don't trust their results because they have **** to me once and will do the same again... they gave me a car with a hooter that doesn't even work but they say the car is roadworthy....so I had to pay for the diagnostic and a new fuse for the hooter on my own account.... I hope really that people sees my complaint....