Many failed cancellations, no refund

In June of last year I moved out of Xfinity coverage area. I tried to cancel my service and was told by reps that my account was cancelled and I would no longer be charged. 

I realized during one of the next few billing cycles that I was still being charged and repeated the process of cancelling my account. I have since tried to cancel my subscription probably 15 times over the last year and a half 5 of those times were in the last week along with a request for a refund on the unused subscription fees. Each day for the last week I have called or chatted with an Xfinity agent asking about a refund on the nearly $1000 in subscription fees since I originally tried to cancel. I've been told by every customer service rep that I am either approved or being applied for approval for a legitimate refund. After each conversation I have been told I will receive an email within 24 hours detailing my refund and cancellation. 

Yesterday I chatted with an agent who said she would cancel my account and that my refund was fully approved and to rest assured I would receive the full amount. I asked her if it would be better for refund purposes to wait until after the refund is processed to cancel the account. Which she ignored comletely and said she had cancelled it. After this conversation I again did not receive an email. 

Today I chatted with an agent who said due to my account now being cancelled I was unable to get a refund for any more than 4 months of service and there was absolutely nothing else she could do for me. I should supposedly be receiving an email in 24 hours. 

I have quadruple checked with the agents that I am checking the correct email address. I have screenshots of all of my communications with agents over the last week. I would really appreciate some help on this as I've spent hours and hours over the last year and a half on the phone trying to get this figured out.