Beware of Discovery Bank!! Check your statement

For the last 3 months I have incorrectly been charged interest on my Discovery card. Last month they admitted there was a problem with clients incorrectly being charged interest and it will be corrected. The same charges however went through again this month and I stillhave not been refunded. Does this bank have liquidity problems and *****ing from their customers to keep afloat?? I cant believe that after 3 months they cant correct such a simple problem. Something is not right. Beware and check your statements!