Sovereign Bank chargea inactivity fee unethically!!! North Andover, Massachusetts

I opened a small business account (for my tutoring service) at Sovereign Bank in 2009. The bank representative assured me that there will be no fees or charges on my account. I deposited $240 and waited for my debit card to deposit more. After two weeks of not receiving the card, I contacted Sovereign Bank to send me a new card. I haven't received the new card since, and couldn't deposit my checks through ATM. Recently, I received a letter from Sovereign bank that they charged $160 inactivity fee from my account.

I visited the bank and explained the situation and told them they don't have a right to charge me without notice. The manager told me that I have agreed and signed to pay the inactive fees, however, I look into the issue more and found out that this new regulation of $16/month inactivity fee started in October, 2010. Therefore, I definitely haven't signed such an agreement and they definitely haven't send me any notice. They unfairly, unethically and even without a notice, charged me $160 from my account.