1. Depending on terms of agreement, in some cases the onus is on YOU to check with the shipping company, as long as the company has proof that they did ship and sent you a tracking number.
2. It sucks (and I've learnt this from getting Celtics tickets unfortunately) this is one of the reason you should pay the extra couple dollars on shipping insurance
3. Call the shipping company, and ask for a "research". They will track where the package did go, and hopefully can still get it to you. If they don't and you Edited. Profanity and masked profanity are against forum rules and may result in discipline. at them enough, they may refund the value or give you discounts in terms of using the shipping company.
4. Unfortunately, if all the above fail, the only recourse you have is to never use that shipping company / buy things from that company again. It's why I refuse to touch the USPS.