Don't think Hermes will do a complete, could try interparcel.com or
www.parcel2go.com or senditnow.com (parcelforce online) for a whole bike.
Ask the seller to go to Halfords or a bike shop and get a box a bike came in turn the bars and wack it in.
If they are incapable of following the basic instructions or can't be arsed I'm sure someone on here could help you out.