Angry Customer

I was incorrectly billed I called to enquire I was given a whole of BS about me paying short hence I had this extra R300 on my account,I then escalated to a team leader called Masixole who promised to ensure that the finance department adds this R300 on my account to ensure I pay less the following which has not happened Sims(consultant) who is going to escalate to the billing department she can see I overpayed and it needs to be rectified in 24hours ref 190136