They took off several K-dramas too on April 1st. Oddly enough I sent them an email saying please don't take off ------- and named a couple of them that were slated to be gone, and when I checked April 2nd the ones I named were still there!!!
So I think sometimes writing them DOES help. Now I wish I had mentioned ALL the K-dramas and not just a few. Sometimes the licensing can be renewed at the last minute.
The last K-drama I watched was 49 Days (2011). I loved it so much I bought the DVD set, just in case someday Netflix decides to take it off Instant.