I've been waiting on service for 3 months now. Haven't received any replacement parts for any of my S4s yet.
I've also been waiting to get my promised compensation for a Batch 1 S4 PSU failure. Don't remember when they promised it exactly, but I'd say I've been waiting for close to 5 months now.
You can always open a ticket and write all necessary data and they will check out your situation. It is very unfortunate that you are waiting that much...