Pending Cancellation for 3 Months

I tried cancelling my service after being a Directv customer for 15 years.  I was told I should see a refund in 4 to 6 weeks from when the equipment was turned in.  In September I received a new bill stating I still had services.  I then called Directv spoke to someone in loyalty who told me my account was pending cancellation.  In NovemberOctober and November  I received another bill deducting services, called again and spoke to someone in loyalty who was communicating with their supervisor who assured me my services were cancelled and pending shut off that evening.  She credited my account. Then I received another bill deduction services again spoke to another supervisor who assured the same thing and should call back if I don't receive an email stating services were cancelled.  Did that again yesterday and the same thing happened again.  I have spent a total of 10 hours on the phone with Directv just trying to cancel my service due to my financial hardship.  Can anyone Help?