Advertisement freezes the app?

[Kasperilaine1]

I am a spotify free user so it's usual that my spotify shows me ads, but now when a certain advertisement came, it doesn't have sound even tho the time indicator goes forward. And when the ad is finished at 20 seconds, this app kinda freezes, it doesn't start playing music but the ad stays at my screen. I can still browse the app but it doesn't let me to play music. When I hit that green "random play" (or whatever it is in english) it just says "get premium to listen any time without ads" and I have restarted the app, used two different devices and the problem still remains. What shall I do?