common problem m8 u need to go to a alloy wheel shop or tyre garage and get yourself a new set of alloy wheel bolts with larger collars on ! i had to do the same , u will only need 12 new bolts + the 4 locking bolts u already have!

ask the trye dealer he might have to give u some locking bolts with bigger collars on!

will cost u another £20.00 or so