Been waiting three months to get deposit refunded!

I cancelled my Telkom landline in October last year, and had a credit of over R500 on my account at the time. I have been trying since then to try get Telkom to refund me this deposit. <br> <br> I have requested a refund several times with the call center and been promised that a cash slip will be delivered to my local Telkom branch within two weeks. No such luck... After three months of trying to get hold of the call center (where you are on hold for ages), I went into my local Telkom branch only to find out that NO refund request is even reflecting on my account. They lodged a new request at the beginning of January, and I still have not heard anything! How can it be this difficult to get the money that is owed to me??