you need to be a bit careful about who you use. I used balloonsandgift once who contract the work out to DHL. Parcel got damaged and despite having paid extra for the insured service I couldn't claim since DHL had a contract with Balloonandgift and not with me. Balloonandgift went strangely quiet when I tried to get them to claim it for me and I never got my money back. It was nearly £100 too so very annoying.
So the message is don't use anyone who subcontracts out the work.