Complaining about postage costs

Ok I know it may sound petty but I have had 2 people complain about postage costs in the last few days. My postage costs are fixed prices so the buyer knows upfront exactly how much it will cost them. Plain and simple if you don't like the postage cost when you are making the purchase why buy it?


 


I have since raised my prices a little to enable me to reduce postage & handling costs, bottom line is though the buyer will still be paying the same.


 


What are other people opinions on it? Do some buyers really think we set the postage costs? It is dictated to us by Click & send etc.