Fraudsters

My account was debited by this company 2 times in 2 weeks via Digicash without my knowledge or consent. They claim to be selling insurance products. I called the company and some dodgy sounding character who sounded like he was driving said he will call me back in an hour. I called back 5 hours later and the same thing happened. I am 100% sure that I have not taken up any insurance products with any insurance company and definitely do not know them. Pls be on the alert for these fraudsters and kindly advise what I can do to get this reported as I cant even find them online