Metropolitan Life won't refund me.

I took a Funeral policy with Metropolitan Life in July 2015 assisted by Thabisa who came to my workplace with the forms for me to fill out and sign. Metropolitan started deducting the premium in August, an amount of R1052.00. I was shocked by this amount and I then contacted Thabisa, the sales consultant to inquire about this amount. She told me that it was an error from their side and she'd speak to her manager and get this error rectified. She also confirmed that they deducted more than they should have and I will be refunded the difference. This happened in September again and I still had not gotten any refund. When I called again, Thabisa told me that she had spoken to her manager and the error had been rectified and she would call me back to say when I'd get the refund. I never got any call, neither did I get my refund. They still in October deducted the same amount. I then personally went to their offices on 12/11/2015. I spoke to the manager whose name is Dirk Du Toit. He assured me that the refund would transferred to my account at the beginning of the following week. I sent an email to Dirk on 20/11/2015 to follow up. There was no reply and still no refund.