3 Months later and still waiting for my money back

I took out a Bond Protector through OOBA. The bond was paid off end September 2014 but the debit order for my Bond protector with Hollard has been going off since then. I contacted Hollard beginning of April, after much struggle I was told I needed to get a letter from the bank confirming that the bond was paid off, this I did, I send it through and phoned the next day to confirm that Hollard received my letter and that everything was in order. I received a confirmation email on the 25th of April confirming that the policy has been cancelled and that I will be refunded. I also received two phone calls telling me that all has been received and that I will be refunded within 12 working days. After 14 working days....still no payment... I phoned again and again and everytime I was told that I would be phoned back. Which I never was.Then I found out the person who handled my case did not read the date on my letter correctly and only requested a refund for one month not the full period.I was assured because it was their mistake they will refund me the same day. Which did not happen. Now another 3 weeks later, once again I was supposed to be phoned back Yesterday, still not paymen