MONEY TAKEN AND NO ONE WANTS TO FERUND ME EVEN AFTER I CALL TO CANCEL THE POLICY

Joined the insurance company about 4yrs ago 2 months ago this year got a call to tell me that i can renew my contract with them they were offering me a sim card for free data and airtime i did agree at first the in 3hours i discover that i was happy with the service i got from the sales guy he never asked me if i need to continue since its been 4 yrs have been not in contact we them so i tried to call back and cancel the insurance i was told to go and get the sim card from them but i did not because already i have requested to cancel the insurance policy no one responded to me same day maybe after 4 days i send an email to ask them can i be called to make sure the policy is cancel but got a call after a month already they have take money in my account when i query about the money taken was told that they will never give me my money in all THE UNLIMITED have a bad service to me they still money from people and i'm really not happy about them,