Adored Children's Learning Academy

I had the worst nightmare with this company. I saw an ad on some webpage about free trial on teeth whitening product. Thought I would give it a try but after filling certain details, decided to stop it. But still I was registered.
I received a package which stated it was free. Next month again I received another which was totally unexpected. I got a phone call from them but said that I would not like to continue it further. Now when I check the bank account, I can see that they have deducted $105 from my account. I am totally upset and feel like I am tricked into it. Afraid to use online shopping or any freebies in future. I am a student and $105 is a huge amount for me.Totally hopeless!!