Warranty on used car

Hi there,

I bought a car on 23rd February 2016. I am not happy with the car as there were several issues on it that needed repairing. Each time the used car garage repaired the problems.
1. The engine management light came on and it needed a new coil pack (this was repaired)
2. The coolant level warning sign kept appearing on the dash, even though the coolant level was fine (this was repaired)
3. Driver's side electric window didnt work
etc. etc.

My question is, I only have a couple of days before the warranty is up, but I am now fed up of having to take the car back to have problems repaired and today the engine management light has come on again!!! Where do I stand when asking for either my money back or for another car that works properly. I am so unhappy as I have lost all confidence in the car now and worried that once this engine management light problem is fixed, it won't be long before something else needs repairing and then warranty will have expired.

Any advice would be greatly appreciated.

Thanks in advance.