How can I get someone to contact me iv got 2 orders one went to a total different state and the other was not a 20ft W by 8ft D plastic storage shed what I got was a junk necklace not my shed

I ordered a shed it said on china post had delivered on the 28th sept the tracking num is am092872205cno I have not received it could you please tell me the name of the carrier who delivered it my address is 1frith court London nw71jp. Colin macgregor

I ordered my package My shed order....tracing number UU072565523CN back in May and it was last updated as received in the United States June 10th and It has not been any updates and I still have not received my package and the seller is not giving me any answers he told me to go to all these different sites and all I want is my shed if somebody could contact me and let me know what is going on with it thank you.