Depends on what you agreed to when purchasing.
Can't blame a seller for shipping issues, unless they agreed to swallow that risk. Well, you can, but is not rational. Once someone sends something, they are no longer in control. Many people will work with you if something happens, but do so at a cost. If a private seller will help out when shipping fails, I usually offer to take 1/2 the loss.
Tracking often is inaccurate, have had stuff show up when tracking showed nothing. Late, early, never. Makes me wonder what could still show up after all this time.
If they did not send, that is another issue.
Good luck obtaining what you seek.