Just because Coleman doesn't have poles anymore doesn't mean they can't address a problem with their product - and it is ultimately their product, not Target's. They could offer you a different replacement product, credit towards a new tent or could even refund you cash themselves.
I understand they told you to contact Target, but that smells of "just tell the dissatisfied customer anything to get them off the phone" to me. They knew that Target probably wouldn't do anything for you at this point. And I suspect they were counting on you to just give up when that happened...
