Filing a complaint

I recently switched my package to a xumo box for streaming. The person that I spent an hour on the phone with on Wednesday set everyone up and said all I had to do was drop off my old cable boxes at a dealer and they’ll know what to do. He said he input everything into my account. I went to a dealer today and he switched out my boxes. When I get home I’m unable to connect anything. I call support and apparently none of my devices were added to my account. Ok fine. So I sat there with the lady on the phone adding my devices one by one. I spent an hour and 40 minutes on the phone with her! After we finally got my internet working she turned her attention to my tvs. I gave her the serial numbers and she stated those were perfect. She was going to do some deep troubleshooting to get me squared away. We got disconnected…. This is at 1 hour and 47 minutes of being on the phone with her. Someone else picks up and doesn’t know the situation. He kept trying to “educate” me about xumo boxes when all I needed was a resolution. He stated that I had the wrong boxes and must go back to the dealer to get new ones. This is after the first lady said I was fine. I asked for a supervisor. A lady named Glen from tech support jumps on and immediately starts blaming me. She insinuated that I went to the dealer and asked for cable boxes instead of a xumo box. Wrong. I didn’t ask for anything. I showed the gentlemen my boxes, he asked me for my info, looked in his computer, and said I’ll be right back. I can only assume all the information is in there after I’ve spent hours on the phone already. I explained my entire ordeal to her and how I’ve been on the phone for nearly two hours. She then blames me again. I asked her how I can file a complaint and she hung up on me. That is the worst customer service I’ve ever received in my life. I’ve been a customer for over twenty years. That woman needs training on how to deescalate and actually provide customer service in a friendly manner. Her attitude and hanging up on customers is insane. Please take care of this. Thanks.