Bank of America Credit Card Complaint

Bank of America Credit card department,

APR or interest rate New Jersey

For years I have had credit cards with Bank of America. When I hit financial issues in 2010, they closed my accounts and began a pay out plan for me at $ -/mo. and $ -/mo. on each card. What I have noticed is that each month they are also charging me an interest fee on purchases ''. Is this a normal fee? It seems it should have been included in the payment and NOT a separate fee being charged each month. Please advise me as to whether this is an acceptable practice. They have already dinged my credit by closing my accounts. They came up with the payment plan so I could get rid of the account balances, which takes forever even when the card is closed! Now I notice the fee when I went in to double check my balances and got curious to check to see if anything is listed on my monthly statements. I would never have discovered this fee otherwise. Thank you.