Refund of premiums

I submitted my first customer query on the 7 July 2015, with regards to a policy that I have been paying for the past 3 years! I then informed Regent that I have since settled my vehicle and have still been paying for a year, when I didn't need to be. I have since been in contact with two different people from Regent, as not one of them have come back to me, after telling me that I need to submit my proof of settlement letter, which I now have done to both people. I am disgusted with the way Regent treats their loyal paying customers! Quick to debit my account every month, but when it comes to refunding my premiums, no one gets back to me!