Thanks for reporting this; I've removed the entry in question.
When I last visited this, Greater Anglia's telesales and web support lines were provided by TheTrainline.com and this also the case with some other train companies. The
terms and conditions page for the Greater Anglia ticket-selling site says that it is managed by TheTrainline.com, so this suggests that it may still be outsourced to that provider.
Do a search of our database for
thetrainline.com and you will see a list of numbers for different train operators. All these numbers are 01709 849xxx which I believe are to the office of TheTrainline.com.
We published 01709 numbers which related directly to the operator in question. It may be that the same staff take calls for all (this seems a sensible approach). As such, you may find that another 01709 number will take your call relating to Greater Anglia Trains.
When I have time I will have a look through those numbers to see if they are still valid, and clear out the non-working ones. If you try any, please let us know which you try and which you find work and which don't.