What do u do when u get overcharged on postage?

[jen2553]

3 items I recently purchased on e-bay I was overcharged on postage,

paid $8.00 was $1.20

paid $9.75 was $1.20

paid $8.00 was $6.60

Have sent a message to the 1st one no answer as yet.

Have still got to send message to the 2nd two. I usually do not worry about a couple of dollars but its getting out of hand now. The last time I left feedback about too much postage I got a nasty e-mail from the seller(that was a couple of years ago)

thanks.