Pimsleur Approach Kathy Heart Sent me packages without my consent then charged me hundreds of dollars. Internet

I agreed to pay under $10 to receive a package of CDs to learn how to speak french. A couple months later I received another package followed by another package a couple months later.

I did not order either of these extra two packages and Pimsleur charged me $512 for the them. They took $128 directly out of my account, but luckily I had to cancel my debit, so they weren't able to charge more. They recently sent me a letter threatening to take leggal actions against me for not paying.

If they did mention these other purchases when I made my first, they definitely did a great job of hiding these details. I read through the details when making the purchase because I didn't want something like this to happen.  

I am a college student and dont have $512 to be spending on learning a foreign language. I havent even used either of the two extra sets of CDs.

I feel like something needs to be done, because I am sure they have tricked many others into doing the same thing. They are basically stealing from innocent people. You should not be allowed to send a person a package without consent and then charge them hundreds of dollars.