The latest excuse I have got from this lot is that refunds will only be considered if applied for within 28 days. I'm not quite sure when they made up this latest rule.

It is more inconvenient when you actually live on the DLR and only use their stations most of the time. The ticket machines were upgraded a year or so ago but, in the spirit of separately negotiated contracts for each part of London's transport network, the new machines are unable to show your Oyster history because they are from a different supplier to the Underground ones, so you have no idea about any incomplete journeys.