Withholding my agreed upon refund

I have been calling for months and have put in well over 10 hours of phone time to resolve this issue regarding my mobile phone line refund. I signed up for a one year free phone line but your company was never able to connect the phone or find the reason for the problem. Therefore I never had phone service and requested the refund for the connection fee and taxes that were taken from my account. I've called at least 7 times and each time after being escalated to a supervisor I was told each time that I would be receiving a refund for all my charges totaling $99.68. Each time I was told that it would be returned to my debit card within 10 days. After not receiving it I would have to call in again and start all over with my facts until I could make it again to another supervisor. On my last call on October 20th I was again told that I would have it returned to my card by October 27th. I again did not receive it. I called in again now, started over again, another 40 minutes on the phone and made it to a supervisor. She said she had to transfer me to another supervisor and she instead transferred me down to an agent. This has happened over and over, saying it's going to be transferred to a supervisor and back down to an agent. Of course it was then disconnected. I have an email sent to me from my phone call on October 20th stating they have refunded my money. I can see XFINITY has no intention of refunding my money which I consider stolen at this point. Is someone at your company going to refund my money???