I was charged a service fee of XXXX dollars for 4 months before I caught it. Associated bank of Wisconsin raised the minimum checking balance from XXXX to XXXX dollars XX/XX/XXXX. I called Associated Bank and complained. They told me that I received numerous notifications especially to my on line banking mail. I have checked My history and there are no notifications. The total amount of fees collected were XXXX dollars. XXXX dollars for each month XX/XX/XXXX, XX/XX/XXXX, XX/XX/XXXX, XX/XX/2015. Associated did credit back XXXX dollars but would not give the full amount back to me.