Milestone credit card Overcharging ,incompetence Columbus Georgia

My mom, the account holder has cancer and has been hospitalized and appointed me her power of attorney as she can not speak above a whisper.therefore I handle all of her bills.as a big convenience to both of us I enrolled her in auto pay so her payments come out automatically on the due date, she is 74 years old and I am her only caregiver. Last month they called threatening her about a late payment and wanting an extra $30 late fee, I immediately went online to her account and checked that she was indeed enrolled in auto pay, she is ,it's on her profile and in account settings, needless to say I called them and explained her medical condition and that she was enrolled in auto pay and it was their fault for not taking the payment out on time and she was NOT paying a late fee, eventually they took payment now this month same thing, late payment plus late fee! They are incompetent and try to stick elderly people with late fees when it is THEIR fault. I have checked,double checked triple checked all settings in her account and clearly stated is you are enrolled in auto pay! If you call the customer service number on your bill you get 10 advertisements then they tell you it's the wrong number and give you another one which is nothing more than even more ads ,this company is a joke and should not be allowed to ripoff anyone let alone the sick and elderly