Looks like Customer Services have given up....
I'm also given their postal address, and I'm asked again why not follow Gatwick Express and Southern on Twitter... I think its retorical, so I wont answer that bit...
Thank you for contacting us on the 14th of July 2015 regarding your ongoing query. Please accept my apologies for the delay in our response.
Unfortunately, on this occasion I cannot answer all your questions in full. However, following our complaints procedure I can confirm that I have escalated your queries to our Escalations team. From there they will contact you with a more full and appropriate response.
I apologise again for any inconveniences caused.
I'm also given their postal address, and I'm asked again why not follow Gatwick Express and Southern on Twitter... I think its retorical, so I wont answer that bit...