I've tried straightening it out but it won't budge 
Only closer inspection against mine, it looks like it might be the wrong way round (assuming you got an MK5 one) - as on mine you know where the seat folds, there is something (some kind of bracket for the seat) that comes out into the boot and the load liner has a "ramp" section - like what you see towards the top right of yours. At the back of my boot (left hand side), again something similar (although not for a seat

) which is where the "ramp" on yours top right would be in the bottom left side (if you switched it around - not sure if I'm making any sense
