How to escalate a complaint

I want it noted that this went on for 17 days I called up T-Mobile when I heard of the deals that they Pay up to $800 per phone to pay off your old phone and then give me a new phone and their price Was really good. It was half the price I Pay AT&T so I was very happy we signed up my 5 phones and was told as soon as I receive my Internet box to set up I was to call them  I gave TMobile all the numbers from the phones they requested.  I sent them a copy of my AT&T statement they requested So they could know how much they need to pay off my phone Then they said The process was being held up because the phones were not ported was asked to call Att and ask for a port #.  we ported four of the phones I didn't port for the fifth phone as of yet. Then they said that it was the Sim card they sent me in the mail. My phones don't use actual SIM cards so they were gonna have to do it with an Esims or something like that then there was something else then there was something else not one time did they mention I had to pay for the phones first.  then after a few days  they informed me that I had to pay off my phones first then they will reimburse me and I explained to them no that's not what was said when I signed up I even asked the woman are you paying off the phones couple times and she said yes, ( you guys have copies of this cause you taped all these conversations ) then for days they were going to fix my problem and Send me a virtual card to pay off the phones and would call me right back well that never happened. Then all of a sudden four of the  phones didn't work at all for 4 days  I called asked for a supervisor at lease 2 time and was informed. That a supervisor would call me back. And again that never happened Each time I called we went through all of that again and I explained to them all over again that I cannot buy those phones and I wasn't told I had to and they said oh we're gonna fix this for you. The last time I called, I was informed that I had to pay for the phones and that's their policy and that I should go back to AT&T I'm 74 years old I was trying to get my Bill down I think Tmobil are Liars and owe me an apology After all that I had to go back my old Internet company now I'm gonna have to pay $50 more each month because I can't get that deal no more and AT&T well let's just say that that was a bust also I would Would like to warn people that TMobile are liers and will say anything to get you to sign up  and it might just end up costing you more at the end instead of helping you I hope that nobody else goes through this like I did. It is not good service. thank you for listening.