[Resolved]  Centurion Bank Of Punjab, Credit Card — Interest Charges of 3.15% instead of .99%

Iam holding a centurion bank of punjab credit card & when i received the card i was informed that for the first six month the Interest charges will be of 0.99% after that 3.15% will be applicable. But in the second month statement itself i was charged Interest of 3.15%. When i contacted the customer care centre, i was told that they have informed to all the customers through Statements, When i said that there was nothing printed about any interest charges in the statement, they gave a reply that they have sent the details through a normal post which i not received. I requested them to recalculate the interest charges to 0.99% or else i will not pay, They said that they dont care for that, I have to pay it. What should i do further.