bought a car but now have issues with dealership

I bought a car over the phone with McCarthy dealer representative Robert, on the 28th of August 2015 and collected and signed documents on the 29th of August 2015. i pointed out a couple of issues initial physically bothered me about the car and the finance documentation to Financial representative Simon but he jokingly said they will sort it out the dealership is not going anywhere and then drove it out on an empty tank to fill up myself. I drove the car home where i constantly identified issues when i eventually go home. i sent my grievances on mail on the 31st of August with accompanying pictures, but the care free response of bringing it on the weekend did not sit well with me and so tried to take car back on the 1st but they were not ready to receive it, as i refused to take a courtesy car that i had to fill up petrol to myself, i drove back the next day and handed over the car to the dealership and again explained my grievance with Simon. He asked that put it on an email i did this and two weeks later i have had the status of the car but i am paying insurance for it