Using Directv with Alexa!

I paid thousands of dollars for this equipment that was supposed to work flawlessly, and it does not, for example, if I'm watching directv and I ask Alexa to change the channel, it actually changes the INPUT to my Firestick and starts trying to find some app to use there, even though I erased the directv app from my firestick months ago. So I can't even change channels with Alexa on my stinkin TV. Nor can I open my favorites list. About the only thing I can do is increase volume.

Can ANYONE help?? Would be happy to record and send video! (Edited per Community Guidelines)