Terrible service

They are terrible, I'm waiting for a refund on my account that I paid to much, I make a mistake, the amount was R230 and I paid R2300. Its now the 3rd week, I send them my bank statement and a letter, and ask them to refund my money, as from Friday 13 I send emails and ask if there is any progress and why it took so long, no response. My account number is ***.