New car....

I picked up the new (used) car today.  All the paperwork was a complete faff, including the DVLA website being down so the sales man had to drive me to the post office to tax the car.  

I drove it back to work with no problems but then on the way home from work later, the oil light and EPC light came on, as well as a stop start error, then the car started to shudder when I put my foot on the gas, a bit like when you are in too high a gear but I wasn't.   I was about 2 miles from home so I drove it home.  I called the garage I brought it from at 5:15 and explained and was told someone would call me before they closed.  They close at 6:30 so at 6:20 I called them again to be told that all the service staff left at 6.  I wasn't very happy. So now I have no car and no way to get to work tomorrow.  

It was brought from a main dealer and I took out an extended warranty so I hope they will sort it out.