JPMorgan Chase & Co. Credit Card Complaint

JPMorgan Chase & Co. Credit card department,

Credit line increase/decrease Massachusetts

My mother has -, and I am her power of attorney. She has been charging hundreds of dollars worth of merchandise that she does not recall ordering. I lowered her credit card limit to $200.00 to prevent this problem and was assured by Chase card representatives on at least two occasions that any attempted charges over this amount would not be approved. At $630.00 I cancelled the card, after several representatives in - departments ( 7 calls total? ) could not explain why charges kept accruing. Finally, someone told me that the credit limit would not stop charges from being approved, and that I would have no choice but to pay the entire balance.