Just done mine only yesterday
I presume they got the correct set in as well?
Ok, for front - open bonnet, and you will see 4 bolts on top of the grill - remove those, and this gives you extra access to behind the front badge; carefully remove the nut and washer [be careful not to drop them] remove badge, replace, and do it back up again...
For rear - I initially removed the rear lining - but with hindsight, I needn't have bothered. Instead, I just slowly worked my way round the badge with my fingers, lifting it up; it is stuck on with tape, so just work your way round - take your time, and it will pop off. Then remove any residue and pop in the new one, having removed the backing. I kept the black grommets on, and just made sure they lined up.
For the wheels, I intend to remove the other 3 tomorrow - and pop out the centre cap from the inside.