Xtra Stress

Every time I rent a movie , I never seem to get it back on time , it does my head in .... even when I think my a/c is clear i always seem to owe money . Four times in the last week I have been told that I owe a fiver when in fact im in credit by €3 ........... bastards are stressing me out .... it's not the money , it's the principle , is my a/c clear or not !!!!!!!!!!!!!!!