Wokingham has payphones, also has help points on platforms, one right next to the door which was allegedly slammed in her face. (should still be there - although has been a while since I've used Wokingham station)
Wokingham isn't an isolated place - it has a taxi rank, and a pub next to it, which has been pointed out in the original thread on the other forum. It is also a few mins walk from the town centre.
In regard to the other passengers, that hasn't been answered yet, either this girl was the only one on the coach, or all the other passengers vanished - maybe they only wanted Wokingham anyway?
Wokingham wouldn't have had a DSM on duty, it was probably again as mentioned on other topic, a member of SWT platform staff, working alone and under pressure at a time of disruption.
In regard to FGW getting her to Farnborough, yes this is true, however there can be reasons why this didn't occur, main being they probably didn't know! Or perhaps knew the bus terminated, but didn't see need to worry, as 2 trains called at Wokingham heading to Farnborough whilst this girl was at the station.