Refund

I had a loan arrangement with FNB. They have been deducting the amount since January, now last month they deducted twice and I asked for a refund. When they refunded me they deducted half of the money again, on Monday the 10th June I called to ask for refund and I was told I'll get it In 48hrs and nothing came through, on Friday the 15th I called again and the lady who was assisting said she'll try to make sure I get the money by Friday, till now I never got it and no one is calling me to tell me what is happening.