PUT ON HOLD WHILE ASKING TO SPEAK TO A MANAGER

On the 21-05-2015, I received an email from MR PRICE MONEY STATEMENT saying I'm one month in arrears of R315.60 also in the email states that your payment profile will be reported to the Credit Bureau. Every month i pay my bill of my monthly instalment is R200.00 on the 09-05-2015 i went to Centurion Mall MR PRICE HOME and i paid R500.00, i know the accounts must be paid on the 7th or before the 7th. as i paid my acc on the 09-05-2015 two days late the only time i could get to a mall I even paid R300.00 extra this month. When i phoned Credit Office in Durban i spoke to Portia, Telling me she don't know why i got the sms because she don't send the smses out, I told het twice its not an sms its an email she can't even apologise ( WHAT BAD CUSTOMER SERVICE CAN'T EVEN GO THE EXTRA MILE ) why do i get this emails cant the credit department do theyr jobs before sending customers these emails?????Aren't they supose to do their homework??? Even the amount outstanding on the email is not correct via my slip! I'm very upset when i asked Portia to put me throug a manager or director she just put me on hold, Im very unhappy with this!! Thinking of closing my account rather.