Purchased a ticket for sending earrings, filled in the address but won't send it; called to ask and said it's cash on delivery, what to do then?

The product in question said it would deliver pendants. After filling in the address, I went there, but it turned out that there was no news about the delivery for half a month. I called customer service and the customer service directly hung up the phone the first time. The second time they directly said that postage would be paid! Then I hung up the phone. You can’t buy tickets on the spot for so much money! If I had known earlier, I should have refunded my tickets and bought them on site! what to do