Have recently purchased many non aviation items from a UK company who never debit my account until despatch and advise on ordering if the goods are there to go and if not when they are due.
On one instance they advised me that delivery would be a week later and offered me the option of placing the order with a competitor. I could live with the extra week so waited and they of course waived the delivery charge.
All told this is how proviation should run their business.