tw@ts, name and shame them
no matter what happens, get the police involved, as someone has comitted the crime of 'obtaining goods by deception' as well as theft and fraud, if the people have used their own cards, then said its an unauthorised charge, then they are also guilty of 'exemption of liability'
the first one is still attempted fraud, as the parcel was initially dispatched, then the full cycle of events had already happened
id take all 3 to court, you can file online (@£80 each case) and they are liable for the costs, you can also add interest at a daily rate from the time you dispatched the goods, to the day the case is awarded in your favour, then if they dont pay up, you send in the bailiffs, again at their expense
good luck m8, scumbags like these should be beaten with rusty co-ax