JPMorgan Chase & Co. Credit Card Complaint

JPMorgan Chase & Co. Credit card department,

Cash advance fee Connecticut

There has been a recurring charge on my monthly statements of - $30.00 for " Cash Advance Interest ''. I never have used cash advances. I finally called ( after neglectfully assuming that it would correct itself ) and spoke first with customer service and then to a a " finance manager '' named -. I asked him to explain the charge. He fumbled for answers and then said he needed to go back in my statements. He went all the way back to 2011 which is when I opened the account. He could not give me any specific reason fro the charge but led me to believe it was something I had done. I asked for a higher authority and he said that all I could do was to write to their review department in -. Is it possible that I have paid over $2100.00 in unwarranted charges over these years?