I have not ordered the product that you asked about. However, My mom has done the same thing you did not once but twice. She order something on line that says it has a free trial and got charge $$ for the product. You are right about reading the fine print. Many times they will state you only get the free trial if you pay for one month. This is not hidden but you do need to really look for it. I suggest you call your credit card company and have them decline the charges. They normally will if you stated what happen.

With that being said I have taken the time to give you some information about teeth whiten every thing from home remedy to over the conter products and what a dentist can do. I hope it helps.

Some research suggest that whitening strips may have side effect such as gum irritation and tooth sensitivity, especially for first time users; with that in mind one may want to start off with shorter time used or a less concentration of whitener. If you are still experiencing the side effect you may wish to stop the use of the strips.

Here are some suggested home remedy that may help to whiten your teeth.
1)Brushing with Lemon Juice
2)Brushing with Baking Soda
3)Brushing with Hydrogen Peroxide
4)Brushing with Salt
5)Rubbing Strawberries on your teeth then Brushing off.
However, all though the above may help whiten your teeth they can do damage as well. They contain sugar and acids and are abrasive, all of which may damaged your enamel that helps protects your teeth

You may wish to consult a Cosmetic Specialist
Cosmetic dentistry may help you to get your best smile at any age. One of the most popular cosmetic dental procedures to a perfect smile is bonding. Cosmetic dental bonding is a fairly painless procedure usually performed in one dental visit by applying an enamel like material to your teeth which is then shaped, hardened with a special light and polished.
For a more dramatic smile, porcelain veneers can make a drastic difference. With veneers, you can control the color, position, shape, and size of your new teeth which can correct crooked, worn, or chipped teeth. This procedure can cost between $1,200 – $3,500 per tooth.
Cosmetic dentistry insurance coverage is not afforded by most dental insurance companies. If you are with a group dental insurance company through your employer, you may want to inquire if cosmetic dentistry insurance coverage is provided under your dental plan.
Cosmetic dental coverage is normally provided by discount dental plans. Discount dental plans usually cover 15 to 20 percent of the cosmetic dental care cost.

There are many different types of tooth past that have whitening as well as mouth wash with whitening this may be another alternative. I suggest you talk with a local dentist and see what you feel will be best for you.