If tracking shows delivery but nothing arrives at your address, check with the shipping service to determine if the tracking corresponds to a delivery to your actual address or not.
Some excellent advice for dealing with false tracking information of various kinds can be found here:
https://community.ebay.com/t5/Buying/what-do-I-do-if-I-never-received-my-package-but-tracking-shows/...
You can avoid many issues by choosing to only purchase from sellers with a demonstrated history of delivering what is advertised, and by avoiding new or unproven sellers offering deals that are "too good to be true".
