Paying for a policy I do not have!!

I accepted a quote for a policy from Oakhurst insurance in August 2015 which I cancelled the next day because I received a better deal from a different service provider. Since then I have been debited money every month from Oakhurst for heavens knows what. I have emailed and tried phoning my \personal portfolio agent"Danelle Ontong about this on many occasions but can never get hold of her on the phone and she does not respond to my emails. I tried phoning the call centre this morning and was kept on hold for a consultant for 10 minutes with no luck! This is absolutely ridiculous service from Oakhurst. I just want my money back and this debit order cancelled is that so much to ask?!!"""