stroll language cds says i owe for cds that i did not order Internet, Internet

i ordered 2 language cds on line  then i received 2 more and when i looked at the invoice  the balance read zero.  i thought they went with the other ones since that is all i ordered.

in july i received an email about my status change i emailed back (which i still have) what are you talking about . i did not receive a response back. so i now called back, i was told that i should have
read the web sight better because it is there 3 times about  this so called trial thing. that it is now to late to send it back 

well according to my email date i am within my 30 days to return it but was told that i could return it at a risk . what does that mean !!!!!!!! they put me into collection without even receiving a single bill in the mail according to them they dont send one its all email ---hello!!!!! some people dont read theirs everyday 

when i pulled up this site and saw the responses i could not believe it. how can they get away with this crap.