My UPS Package Went Missing and I Got It Back! + A Thrift Store Haul 

Have you ever lost a package or had it stolen?

This is currently happening and I have no idea what to do. Basically I bought an item for £150 on vinted that ups deals with the delivery. Its been 3 weeks without my package. The seller lives in London and I live in London. When I look at the tracking, it STILL says 'on the way' BUT ITS IN GERMANY!? I called the ups twice and they told me I need to contact the seller and get them to call ups. I dont know why. All I want to know is if I'm ever gonna get my package and when will it come. I tried contacting the seller and they are ghosting. I'm pissed 😤