Cancelled DirecTV Stream but am still being charged

Hello Mr. Bill Morrow,

I just cancelled DirecTV Stream before I was charged for my next month. However, I was told I would be charged for another month, and customer service couldn't help me. I have been an AT&T and DirecTV customer for many years, and, unfortunately, this is how a loyal customer is treated. It's also unfortunate that DirecTV would decide to charge a customer another month and risk me telling all my friends and family about this experience. I am sure friends and family will cancel their current service and will never look to use DirecTV in the future. There are other options for customers like YouTube TV that are much cheaper. With this experience DirectTV will lose much more than just my one month of $122 you have decided to charge me, even though I'm cancelling before I am charged. 

If you would like to rectify this, I would ask that I be refunded for the bill I will be charged for on March 7th that I cancelled on March 6th. 

Hopefully, the correct business decision is made here. 

Thank you,