JPMorgan Chase Credit Card Complaint

JPMorgan Chase Credit card department,

APR or interest rate Wisconsin

I have a Chase British Airways - card. I have always paid off the entire balance. APR is 15.24 % so I would never ever consider carrying a balance. The statement period that ended -/-/15 had a balance of $20000.00. I made total payments $20000.00, there was also a credit in the amount of $16.00. Thus the balance to be carried over to the next statement period was $380.00. My mistake but I figured that it would n't cost me much. I was quite surprised when I reviewed the -/-/15 statement - interest in the amount of $54.00 was charged. I discovered that Chase charged full interest on a balance of $4200.00 that would appear during the next billing period. I think this is grossly unfair, My position is that I should pay interest only on the $380.00 difference stated above. After reviewing complaints on your site I have learned that this is systematized. This makes Chase standout as a first class loan shark. I am questioning whether I should continue to do business with Chase. I hereby request that Chase refunds me the difference between $54.00 and the approximate $4.00 that I should have paid on a $380.00 balance. This means a refund of $49.00.