Reader's Digest — Not getting the monthly copy

Address:

Pune, Maharashtra, 411025

After subscription, they sent copies if rd for 3 month. After that i didn't receive any copy from the last 3 month. I complained to customer care. They said they had sent the copies, since i didn't get that, they r sending duplicate copies but still i did not get any copy.
I enquired from local post office too. They said they hv not received any such copies