Last weekend I tried to login to Spotify at friend's computer. I could not log on for some reason - thought I had forgotten my password. Then another friend (spotify username: nikiri) logged in on her account, but at that point our accounts got mixed up. When she logged on with her username and password, my name and playlists appear on her Spotify. She also has access to my premium account. When I tried to log on the next day, the same thing happened to me: After using my e-mail and password to log on, her username and playlists appear. What is this? How can we fix this? Because of this I cannot use Spotify on my iPhone. I also tried to change my password but could not do that.
Please help as soon as possible.