Discover Magazine Subscription not reaching through post

I have subscribed Discover Magazine online but it is not reaching through post to me in Islamabad.

(According to discovermagazine.com, they have sent me copies of December & January) (I subscribed online because local distributor's subscription price is very high)

Please guide what to do. Thanks.

Contact them and tell them you haven't received it. If you really need it, ask them to send it via a trackable method.