Refunds and billing history with closed accounts

I spoke with a few reps on the phone. Two weeks ago. You deducted a payment from my bank account on 10/18 due to autopsy.  I was told that I would receive a refund in 2 days. It's been 10 and nothing. I've also asked for billing history. Received nothing. Why can't I see what you've deducted?  Do I need to file a dispute with my bank for a charge back, because I will!  

You can also count on me NEVER conducting any business with your company.