I once didn't properly unlink Spotify when I returned my car to the leasing company. The driver taking it back played bhangra for about half an hour using my account before I noticed. Changing the password, unlinking devices nothing worked. I eventually got him to stop by constantly switching it to the Barbie Girl by Aqua and then finally Spotify support was able to unlink it. I was then recommended bhangra for months. Four consecutive Discover Weeklies were 100% bhangra. Now I like the odd track every now and then, but playing less than an hour of a genre should not be enough to do that.