[mothered]

The CS has sent me an email last night, inquiring if I had received the package

The rep/agent obviously does not know the whereabouts of the consignment, hence the email asking whether or not you've received the package.

Evidently, It's working to your advantage thus far.

Can I play the gullible card and push thru this claim?

Based on the above events and on the grounds no new evidence has come to hand, hit the SE accordingly.