New Contract Cancelled with No Reason and I was Billed Incorrectly

In September, I was offered a deal on internet only @ $65 with not payment in October.  I'm on autopay.  Today they pulled for my old contract amount $158 with an increase.  So, they pulled $181.29 out of my account.  When I called, customer service told me I would get my money back as it was their mistake.  I was told I would be transferred to cancel the cable and go back to the deal I was offered.  Once I was transferred, I was told that they would NOT refund the funds without calling in another 10 DAYS to request one, and that I would have a credit on my account.  I understand ACH refunds take time.  However, I am now out $181.29. 

Please note that both reps I spoke to were very nice.  However, for a mistake like this, there should be some way to make it right.