Wynk Music — Subscription problem

I subscribed for yearly premium plan of wynk music in december itself and today onwards it is showing please subscribe or upgrade.. I have already paid 299 rs for yearly plan but now they are not even showing the bill that i paid of 299 now.. How to proove them now.. This happened with me earlier with one month plan too.. But when i have already paid for yearly plan how come this can happen. Even tried to contact wynk music but as usual they din't even hear my complain.. Responding is far away from that