Tupperware shortage

Good day, I just want to no if there is other people that also waiting so long for there items, evey month when I go and collect my tupperware products for my clients there is always stuff SHORT and then I wait for 2 - 3 weeks before I get it. Why don't they not have enougth products when they know it is specials, and I am LOOSING CLIENT's people don't want to buy anymore