100 quid taken from my account by Itunes.

My daughter was using a Piano learning app. After a while it asked if i wanted a trial period ( which i clicked yes on ) i thought a bit odd as we had already used it for about a week. When i was abroad working 100 quid was suddenly taken from the account. WTF.

Any app i have used before required me to actively agree to start paying after a trial period. Is this normal practice to have to actively cancel trial periods otherwise they take a yearly subscription?