Payment dates

I am generally happy with the services i get but what i can not understand is why i get emails stating i am in arrears on the 26 of the month when i only get a statement on the 1st and i specifically said when i app**** for the card that i get paid on the last day of the month. When i call them i also get told that i am not in arrears, so is this going to count against me on ITC. Can someone please sprt this out sothat we can continue