[Jaccmcmcnn]

In terms of their comment below, yes It was delivered to you namely your address, but you did not receive the package - It was dumped on your porch available to anyone to take It.

Tell them to provide evidence of the package personally handed to you.

Doesn't this put me at risk of being banned, and possibly not able to return if neccesary?

How so?

When they said "If this problem continues, we may not allow you to buy on our store "