RECKLESS LENDING

This is now outrageous that a company can increase your credit limit, without permission. With the increase come a much higher monthly payment. This is the price that I am suffering now, because I pay my account on time. Suddenly my credit limit has increased over the rooftop. This after I told them, not to do so. They don't care if you have food on the table or you manage your finances, they just don't care about your affordability. As long as they can sell products and charge you. I don't know what to do, because their letters means nothing. So I need advice, on how to handle this situation. Thank you in advance for the help.