Well the offer me to buy some software during Crowdsale, I liked the idea DAG and bought some.
What have I done wrong

Did you verify that Iota adhered to all laws and regulations for selling investment securities in every jurisdiction where they offered the "tokens" for sale to investors?
Specifically did they register these tokens with the SEC in the USA? If not, did they restrict non-qualified USA investors from obtaining the coins?
I hope you aware it is against the policy of crowdfunding sites such as Kickstarter and Indiegogo to offer any shares or redeemable tokens to contributors.