Accounts

They made a mistake on my account for a value of over R 1 500.00. I phoned them two months ago regarding this, just to have my account deducted with over R 2 200.00 this month. I had to keep following up as no feedback was provided. Phoned them again today, and was informed that no action had been taken as of yet and that the credit note was only passed today. The credit note takes 3 to 4 business days to approve and refunds are only done on Fridays. Why am I at an inconvenience for a mistake made by them, which I had informed them of well ahead of time? I had to phone them 4 times just to get someone to action this. I am at a loss for words. This was completely unexpected and is definitely unacceptable.