I queried an item I received but was not worth my time returning for £4.
The seller responded with this...
The FREE return procedure is as follows :
Put the item back into the Envelope ( in which you have received it ) with a short note describing your problem and Reseal it.
Cross out your address and Circle the Sender Address.
Also Write ( RETURN TO SENDER ) on the Top of the Envelope.
Drop it in the nearby Post Box.
(As no need to use a new Stamp or go to the Post office. )
You couldn't make it up lol.