request to close account and refund credit balance

I have send an email to the above mentioned company and requested that my account be closed and to request a refund on my credit balance of R3287.39 as reflected on the statements I have been receiving from them. I was told it will take 7 workings days. The first email was send on 11.05.2015 and to date I have not received any response with regards to my request. I am really upset with the service that I have been receiving from this company. This account is paid in full and I do not owe them, but since they are the ones who have to pay me back I am being ignored. All I want is for them to refund my money and close the account, they are in possession of my bank details as I have attached it to the first email send. The last email was send on 30.05.2015 after weekly and daily emails for the whole month of May. I hope this matter will be resolved.