All you now need to do is register with the same mobile number on the new device as well and you will find all your music/playlists carried over to your new device.
Only catch is that you will still have to download songs in Wynk Music >> 'My Music' >> 'All Downloaded' & Wynk Music >> 'My Music' >> 'All Purchased'.We have already provided 'Download All' button to help you with that.