never use eBuyer again
I ordered a disk, next day delivery on a Tuesday. When it hadn't appeared Wednesday evening, a call to the courier revealed that eBuyer hadn't used the "next day" code, so the package was fucknowswhere.
This was over Easter, so I actually got the disk Tuesday after Bank Holiday Monday - when it was of no use to me in my planned visit to the parents.
eBuyer lied about messing up the delivery, until ParcelForce got upset at being called liars, and produced the delivery note - clearly showing "standard" postage.
Compare and contrast with (for example) Amazon, who have also messed up. However, they have been (in my experience) incredibly good at fixing things. And not by lying.