Not honouring the booking

After booking a ticket for my son. taking the expensive journey to book a ticket that I can change the date, I had to change the date and pay a hefty penalty. The return date was changed also, I had no definite date and emailed travelstart to that effect. However, now that I have a date, they say the booking cannot be used as there was a \no-show".... there was no \""no-show\"" ... I had no date and my words in email was: I will let you know.<br> <br> NO return email to say this is not allowed ... just a soddy email advising me that the booking I want to make now"