Bad Service

I have now been calling for the past 2 weeks trying to speak to an agent regarding a policy I have canceled last month but still being billed for this month, I have been put on hold for 20 min or more numerous times and I have phone records to prove this I have even requested a call back last week but obviously no one called me back this is upsetting to say the least because when they want to sign you up for a policy they know to call but can not assist with anything else