Recommend a main dealer for service?

[manca]

Hi all
2010 D4 4.2tdi needing a major service. Car history is all Audi so figure I'll make use of the fixed price service plan at £399.
I live in North Surrey, local dealer is Driftbridge Audi at Epsom. No idea about their service dept but have always found the parts guys helpful. Anyway I have contacted them twice to book the car in but two weeks later no call back and no booking..... time to look elsewhere methinks.
Anyone recommend somewhere localish to me?