Irritating Calls

I Pay my INSTALLMENT of my account EVERY MONTH and then the people of Mr. Price will still keep on calling with unacceptable attitude, telling me that I still owe R90 of my outstanding balance, but I pay my INSTALLMENTS EVERY MONTH as expected!! Calling me at nights and even on Sundays !! Telling us "thank you for NOTHING " this attitude is unacceptable!!! Call the people who does not pay their accounts at all, instead of the people who pays every month!!!!!