Can't get the elixir store to sell me anything

I had this problem with the consignment store register. When it happened I'd just click the cancel consignments option and click on the items with the negative days. But I don't have the cancel consignments option at the elixir shop so I don't know what to do to fix it. I have no mods. And I have tried deleting the register, the lot, clicking on the cashier instead and nothing seems to work except the cancel consignments option which I don't have.