Saying, "I didn't read the terms of the agreement" is not grounds for a chargeback.
What's worse is when you've signed up for a One year recurring payment and you have to jump through hoops to cancel such as a registered letter to cancel.
Wells fargo will refuse to cancel for you, saying it is between you and the vendor. Further to that, you can't even cancel your credit card, as Wells Fargo will transfer the recurring charge to a new card.
About the only way I could figure out how to get out of that type of recurring scam is to just cancel my bank account.