one messed up company

I REALLY DONT UNDERSTAND YOUR ACCOUNTS DEPARTMENT, IT IS ONE OF THE MOST MESSED UP PLACES I HAVE EVER DELT WITH. HOW DO YOU GET THAT I CURRENTLY OWE YOU WHEN MY PAYMENTS ARE MADE MONTHLY AND REFLECTS THIS WAY:<br> <br> July 2015 minus R 4.07<br> September 2015 R 60.60<br> October 2015 MINUS R 92.17<br> November 2015 R 268.03<br> December 2015 MINUS R 4.31<br> January 2016 R 208.19<br> February 2016 R 350 PAID YET TODAY IT SHOWS I OWE YOU R 777. AND LET ME HELP NO I AM NOT ON THE HIGHEST PACKAGE I AM ONLY ON THE PACKAGE FOR R320 PER MONTH. YOU ARE MESSED UP SORT OUT MY ACCOUNT TODAY!!!