No, please don’t suggest that people do chargebacks. I worked in the credit card industry for 15 years and it is not something that you just do. First of all you will have to prove that the company that you purchased something from is not willing to give a refund, you would need to contact the company first. As Blizzard has already explained that they are attempting to make this right and are simply trying to figure how that will work, there is no need to do a chargeback.
Chargebacks can not only effect your credit score, but could also get you in trouble with you bank and or credit card company as they WILL do an investigation and if they find that you did not try to work with the company they will take action against you. You will also find that a company that you do a charge back against will tend to fire you as a customer and or not allow you to pay via debit or credit cards again.
We do not suggest that people do charge backs here on the CSF and would tell people to work with Blizzard.