Ebay rips people off of money and item and you can't do anything

I ordered an item in february.it was 520rand with the shipping cost.the estimated date of delivery had passed so I contacted the seller.seller said she can't do anything it's USPS courier and there's nothing she can do I must be patient due to covid.after a month I tried again she said the same thing.si I got angry and she then blocked me.i contacted ebay cos it's their platform .they said 21 days passed they can't help me.i tried so many things I even tried my local post office with the global tracking code from eBay and I was told that this item never entered south africa.its now 7 months and they say I can't do anything .I then got a hold of the seller on her personal business messenger and she told me USPS nobody answers the phone.now I paid fr this item and for shipping they suppose to sort this out with the courier company that they use.but I'm left with no help no product no refund.rippef of by ebay.how does their courier company impact me when it's their duty to sort it out.now they just don't care that I haven't got my item or refund and it's just like that. They could at least tell the seller to make sure you get this customer her feedback.nobody cares