T-Mobile Home Internet infuriating, atrocious, and aggravating

I am experiencing horrible buffering. At 2:00 AM the download is 200.+. But in the normal usage hours, it is .5 or less. Trying to watch TV is so frustrating and watching a football game?-forget that. I have dealt with customer service so many times in the last month. If I can get a rep who I can understand (i.e. English is their fourth language) I get constant run-around. First, "just give it time"; next, "Theres a problem at the tower"; next, we will replace the gateway; next "Hmmm". Finally, "there's a problem with the tower."  None of this solves my problem. How do I escalate this??? Ive tried being polite, but my polite is wearing thin!  Please know, I am the opposite of a techie!  I don't understand all the numbers…I just want something that works! Can't use IPhone, doorbell doesn't transmit, it's like living in the 50's. Lord, I don't want to go back to Spectrum or Frontier