Bought a month of spotify premium yesterday and although it is working properly on my pc, there seems to be a problem on the phone app. Although there are no ads and I can download and listen to the songs on offline mode, I can't go back on a playlist or I can't skip as many songs as I want. When I do try to do that, there is a pop-up that says I sould upgrade to premium. I tried to relog and I have double-checked that I have the same account on pc and phone (In both systems I log in through facebook). Any ideas on how to fix the problem?