They advertised an item as a pack of 12. I ordere...

They advertised an item as a pack of 12. I ordered the pack and paid for it, but only a single one of the items was sent. The price I paid is far too high for only a single one of the items. They have no customer service # that I can call during the pandemic, and emailing them back and forth to get a refund has taken nearly a month thus far, with several unintelligible replies from them and no resolution yet.