After commenting here this morning I went to the post office to find a parcel had arrived that I wasn't expecting for at least another week. I had selected the cheapest freight option and received notification on the 5th. that it had been dispatched.
Also, this is the first order that they have got wrong, omitting about three bucks worth of bits and adding in some parts worth about seventy bucks. The invoice only listed what I had originally ordered/paid for. Probably not worth following it up as the return freight cost would no doubt outweigh the cost of the goods. So I would not expect that they would want the goods back. The parts I didn't get I am not desperate for, and the bonus parts are useable. Obviously this is part of the downside of overseas orders.
Cheers, Mick.

