I did a free trial on spotify, then cancelled it. I continued to use the free version, then randomly, 6 months or so later Spotify charged me £9.99. I checked that the devices I was using it on were all on the free version, which they were. I then attempted to log in to find out why I had been charged for a service I hadn’t asked for and wasn’t receiving and got locked in an infinite loop of “that’s not your password”, “no account exists for that email address” and “that email address is already in use”. Frustrated I went to my bank to cancel the direct debit that had taken the £9.99 and was told that Spotify don’t use direct debits, its actually a sort of open ended re-ccuring charge that cant easily be cancelled. I had to spend 45 or so minutes in the bank arguing with one guy, then his manager that I was unable to cancel this with them direct, and finally they agree to put some sort of stop on it.
That’s been my experience of Spotify, im still not sure what happened, maybe it was someone using my bank details to fund their spotify, who knows, but they were a nightmare to get out of paying.