Dear Madam,
We are so sorry for the inconvenience caused.
To dispatch a driver from London takes longer therefore your driver arranged a local cab company to drive you back to your hotel in Heathrow. You were picked up within 2 hours of the car breaking down and our driver paid for the ride. Given the unusual circumstances, our driver did her level best to get you back to your hotel safely and in a timely manner without abandoning you on the road side.
Due to the rural location the car stopped, the driver couldn't arrange another driver straight away.
The driver confirmed to us that you weren't standing outside for 2 hours. Within 15 minutes of the vehicle breaking down with help of a highway patrol officer, the vehicle was moved to a layby and you were waiting inside the car till the other driver arrived.
Our driver was on time, drove you 70 miles to Stonehenge on time for your admission, waited for you and drove you back . Her vehicle was running perfectly until it lost power on the way back. Hopefully you can understand that this was out of any of our control.