4-5 Tablets out of stock for more than 2 months, expect customers to be patient for a back order that takes 6 weeks

Your online store displays roughly around 8 different tablets to choose from. About 4-5 of these items has been out of stock for more than two months. As a respectful and paying customer you expect me to wait 6 weeks for a back order just because your stockpiling methods or demand calculations are terrible. A big Oligopoly giant like yourself you struggle to keep your stock levels in line. Could somebody from your supply-chain please give me a call I would like to understand if you are following the rule of order only as needed?