I have three children aged 15, 13 and 11. Over the years I have had real problems when I have to ring the Oyster helpline for any issues to do with their travelcards. The staff seem very poorly trained and it is very difficult to get put through to someone that had the necessary experience of how the website works to solve your problem. I usually need about two hours to sort out a problem and have to ring four and five times to be put through to somebody competant. I feel I can't be alone in having this experience would like to hear from other frustrated parents.