JPMorgan Chase & Co. Credit Card Complaint

JPMorgan Chase & Co. Credit card department,

APR or interest rate California

My credit card contract stipulated that I would incur no interest charges if balances are paid in full by the statement due date. I mistakenly short paid my -/-/- statement by $120.00 and saw interest charges on my -/-/- statement for $33.00. Knowing that it was my fault, I paid the interest charges and full open balance before the specified due date. My -/-/- statement reflected additional interest charges of $55.00. When I called the credit card company to discuss the issue, I was given a very fragmented explanation about how the interest was calculated and that the -/-/- statement was reflecting interest for -/-/- purchases. In the end, I am paying $88.00 in interest charges for short paying my -/-/- statement by $120.00. The representative could provide no explanation as to why the interest charges were excessive. In addition, the representative refused to remove the charges or compromise. I understand that the interest is calculated daily and compounding occurs, but something is not right here.