I cannot have 30 minutes of uninterrupted listening although I have watched the advertisements

[user-removed]

Plan

Free/Premium

Country

Device

(iPhone 8, Samsung Galaxy 9, Macbook Pro late 2016)

Operating System

(iOS 10, Android Oreo, Windows 10,etc.)

My Question or Issue

I cannot have 30 minutes of uninterrupted listening even though I have watched the ads. A few days ago, I pressed 'no thanks' when the 'watch this video to get 30 minutes of uninterrupted listening' ad appeared before the songs started. Starting from that moment, many advertisements appeared after a few songs were played every time. Hence, I can't have 30 minutes of ad free listening as advertisements will play automatically after every few songs. Please help me to fix this issue so that I have 30 minutes of uninterrupted listening after I played the 'watch this video to get 30 minutes of uninterrupted listening' ad. Thank you.