Magic Mesh Gross overcharge Internet

I ordered one magic mesh and was offered another for shipping and handling charges. The total order was $19.95 + $ 7.95 s&h plus another $ 7.95 for 1 more screendoor. Easy enough to add the total order, right? $ 35 .85 for two. Apparently I need 3 because thats what they sent me and was charged another $ 71.70 for not knowing that fact. So somebody made a mistake, right? No problem, contact them and straighten them out . Theyre making it extremely difficult to rectify, so much so that the only course of action is to dispute the charges and somehow find yourself here. Theres gotta be a politician involved somewhere in this picture.