AT&T, Direct TV Didn't receive discount on monthly bill as advised. Nationwide

AT&T ownes Direct TV so we got a bundled packaged when switching cell phone service from Sprint in Aug. 2016.

In April 2017 I upgraded my cell phone service.  The only difference between the plan I picked & the only other plan above mine was hotspot service on our phones which isn't needed.  I was told because I was upgradeding to a premium package, after 3 months I would receive a $25.00 credit towards my Direct TV bill.  This was confirmed by 3 different cust. service people on 3 different days.  

I have all the persons names, dates, & times I spoke with them.  After checking my bill when the discount was supposed to be applied there was no discount.  I called Direct TV who said I neeed to call AT&T so back & forth I went.

Long story short I was told the plan I was on didn't offer this discount. I explained to the CSR what I was told, by whom, dates & times. She put me on hold to check with her manager & I was advised they were not able to give me the $25.00 discount. I explained my plan expires Aug. 2018 & I'll be dropping them at that time & to remove me from all mailing lists as I'm no longer interested in receiving any info.  Most TV isn't worth watching anyway so I'll probably switch to a streaming service such as Hulu.

I'm in sales & when you tell a cusotmer something you better deliver & not lie to them like I was lied too.

To be fair, I am happy with AT&T's cell phone service & glad I switched from Sprint. AT&T is so much better then Sprint.