Airtel — Wynk disappointing

I am airtel customer since 5 years and wynk music was free for me for download and play songs offline but from today evening suddenly it stopped playing offline or download songs and started asking for buying a subscription while my airtel thanx plan is active...i have called customer care but they say everything is fine you should talk to wynk customer service and when i chat in wynk customer service they give irrelevant answers because they use automated chat system...i have not expected this kind of service... I can't understand everything was fine since years what happened now they are asking for buying a subscription while i am a airtel thanx member and whnk was free for me and even my pack is active my airtel no is [protected]