WOW that a whole lot!!! I once had a deal for a month abroad to have unlimited internet for +- 30 euro's (got a message it was activated) and the phonecompany made some kind of mistake by not putting the data-bundle active and I got a bill of +- 900 Euro's it shocked me to te core because they called me up during my vacation to tell me if I realized, that I had made that big of a internet bill on my phone!!
Luckily my parents got it al refunded within a month but the vacation was totally ruined because I was so scared I had to actually pay that amount! (I was like 18 at the time)