I was in the US for 10 days and I just received my monthly bill and was charged $80 extra for roaming for 5 different days $16 for each day.
I am contesting these charges because both "Cellular Data" and "Data Roaming" were manually disabled on my device prior to departure and remained off for the duration of the trip. Also, no cellular data was consumed, and no roaming services were utilized during this period.
How do I dispute this?