Don't do much ebay selling but did some over the weekend and posted out items today. I have overcharged postage as turned out they count as large letter rather than parcel rate. Each parcel was £1.09 and I've charged £2.00 for each one.
Is this too much? And if so I do I go about making a partial refund and how much do you think it should be? I don't have any packaging costs as they were old jiffy bags and post office is within walking distance.
Thank you :)