35 years a customer and you call and mail me that ...

35 years a customer and you call and mail me that my payment is 4 days late...might I remind you that you changed my billing pattern form every two months to monthly..not me...I suggest you look at which customers are usually late with payment and deal with them..nice that you had a recorded perky woman call to tell me that my payment was late..you have a monopoly on power here please act like it..