Ridiculous Train Tickets

I don't like the train route from Euston to Birmingham very much, because we had bad experiences three times. First, we had to buy an expensive tickets due to rush hours. Second, we were trapped in a train for about 2 hours on a hot summer day without air conditioner. Third, we bought return tickets when we left the house, but we couldn't use them (from Euston to Birmingham), because a ticket officer gave us a wrong information by mistake and we HAD TO BUY TICKETS AGAIN!!! It's rediculous. We were told that it's ok if we got a train to Birmingham until 16:00, but in fact, we had to get on a train untill 15:00. I was so angry, because it was not our fault. The officer made a mistake and of course there was no refund. Consequently, we bought tickets again, missed the fast train, and had to get on a slow train.

We are going to use the same route again.  I hope everything will be ok...