He gave me the number but USPS, says its not recognisable...
VF 214 810 882 US ???
USPS - Track & Confirm
Was your package shipped via Express mail?
Ask your seller if he has the customs number and this can be tracked through the UK post office website. It should be on his US post office receipt.
I don't know if you tried it either, but the number/letters have to be all together, with no spaces.
But yes, when you ship Express and whatnot, its the label number; it doesn't say tracking.
Try that, otherwise, ask the seller and see what they come up with. Sometimes (for me, too) it took a day or so to show up on the website.
Just depends on the post office it was shipped from too.