Debited money without my consent

I app**** for a funeral policy and immediately decided not to take the policy after i have given them all my details . so i called them to cancel the policy which according to them i still had the time to do so. but at the end of the month money was debited out of my account . i called them again to ask why money was taken out of my account. they said it was a mistake and they will return the money within a week and its been a month that money has not yet returned to my account. i am so disappointed by the way they treat customers. there was no follow up at all with my case.