Item not received

Hi can anyone help me please?. I recently purchased an item and was expected to arrive by 21/4/26. The item when sent was untracked with no tracking number but after reporting it last week I've got up today to it saying it was delivered last week and has a tracking number. However when I have tracked it it isn't even my postcode. Trying to get help from eBay is a nightmare. Can anyone help me please