RCS charging me for refunds on my own money which was their mistake!

This is really unprofessional. Not only did the 2 agents Ive dealt with, give me the wrong settlement balance information, I am now also liable for penalty of my refund. I asked the second female whom I spoke to what the extra is because my balance was not as high and she advised that this is the interest accrued. Not only was I fed incorrect information but now need to send supporting documentation for MY money to be REFUNDED into MY ACCOUNT! I was also advised that a service fee is charged on all accounts with a credit balance of more than R70. What a ripoff I am really just furious because I've been trying to contact this people for more than a week now. As the amount paid in is quite high.