Automatic cashback so you don't have to do anything. I've got a similar deal to this sand my cheque came in a month after I entered into the contract.
10 quid from quidco
We will automatically send you the advertised cashback amount within 38
working days of receipt of your phone. There is no need to claim!
Doesn't tell you on the website, but if you call them up they may tell you its RED entertainment (this has to be confirmed for this particular deal, haven't checked it for this one)