Capital One Credit Card Complaint

Capital One Credit card department,

Credit determination Georgia

In a 31 day or less Billing Cycle I make at least - payment to my accounts with Capital One. Each time I make these - payments this company takes almost 50 % of the payment amount toward the balance for APR each time, not only for purchases but cash advances. Making it almost impossible to every pay down your balances. I want to know the interest that is charge should be on each payment you make after initially making your minium monthly payments each month is a violation of my consumer rights?