Can someone contact me

I am mortified at AT&T and my daughters new service. She got new service August 16th. Everything was good till Monday when she arrived home from work. No service no signal. Called the technician and he said unplug everything and reboot, did that and 10 seconds later service off. He said she had to call AT&T. She calls me we call support and the very nice rep did everything to fix the problem and nothing. My daughter ended up plugging up the other wireless box in order to just get a signal.
The support rep set up a service call for August 19th from 4pm-8p. At 7:45p on August 19th no service call tech came yet and I started a online chat and at same time dispatch called to say the tech was running behind and was very doubtful that he would be coming that night. I was upset that my daughter waited up for nothing as she has to be at work at 4a EST.
We tried to make another appt but my daughter and I work so the times were not working. Spoke to dispatch manager Brent and he confirmed the late hours and was not positive a service tech would make it.
We said that my daughter had already waited over 4 hours and didn't want to tie up another day waiting 4 hours. He said he would escalate the appt for August 20th 8-10a. Great we said.
Dispatch calls back at 8:36p to say tech on way. Ok I said and she's glad that she did not schedule appt for August 20th. Tech calls and he said it'll take 20 mins. After 35 min he's not here so at 9:02p my daughter wants to go to bed so I call tech and tell him it's too late. He said he would discuss this with his manager and would call me. So far no call.
Today at 7a I call to see if an appt can be set again for 8-10a but dispatch was closed. Started chat but it was disconnected so supervisor called to escalate this matter. He said an appt was set up for 2-4p on August 21st. Spoke to my daughter and she said she never made that appt she'll be at work. In the meantime She called the installation manager Dwayne but he has not called her back after 3 hours ago. Just got a text from AT&T that service appt is from 12-4 August 21st, which again no one even made that appt....and she'll be at work. Please help to get this resolved, my daughter wants to terminate her service for Xfinity Comcast. This is her first time having AT&T and it had started off very bad for her. She said she's paying for full service but had to use the wireless box just to get service.