OVER CHARGE POSTAGE AND ITEMS PURCHASED - ******!!!!

When I want to do the payment the postage came out more than what I am paying for the items and picked up with the postage I am paying more than what the items cost in the shops. How can a Company like can come away with this for years??? PLEASE LOOK INTO THIS MATTER AS I HAVE REPORTED IT ALSO! THIS CAMPANY NEEDS TOBE CLOSED DOWN!!!