So after submitting a complain, today I got a response that the TM was indeed right to issue a new ticket, but I was offered ,a first class return ,that has to be used up to November 2013, (in form of a code) ,this is in addition to £65 in RTV already received,so I am quiet happy after all , as I actually arrived earlier than I would otherwise do if I followed the advance ticket ,got a free journey ,plus a 1st return ticket.
I would like to thank all of you,who answered in this thread for their help!
PS what would be the best value ticket for the journey?