Absolute scam. Avoid. The whole process is littered with pitfalls. We purchased a river cruise for £36 for our son for Christmas. Unfortunately he didn't realise the expiry was in March. We telephoned, waited for 20 mins on a premium rate and was told that to extend would be a further £10 and that we needed to send the voucher and cheque back. A pain but acceptable. We waited 3 weeks and was told that I didn't need to wait and could extended by card online. I declined because cheque sent previously. On further enquiry (another 25 mins) they said that they still hadn't processed but as the cost had increased they wanted a further £29 on top of the £10 making the whole cost totally unacceptable. Truly awful customer relations.