How do you contact T-mobile's complaint department? Is this it? How do I email or write the CEO?

I have been a T-Mobile customer for 20+ years. Up until now, I have been happy with their service. However, about a week ago I began to see advertisements for free I-Phone 14+ and Samsung S23 phones for new customers. I called into T-Mobile support on Monday 2/13/2023,27  to see if they would give me the same offer they were giving to new customers. Previously, when I dialed 611 or called T-Mobile customer service, I spoke with someone in Texas. The last time I had an issue was a few years ago, so I was surprised that the Customer Service people are now in the Philippines. It is difficult to communicate with the representatives due to the lag time in each other's voices as well as their accent. That resulted in both of us talking over each other multiple times. 
In any case, I called on Tuesday, and, after waiting on hold for 27 minutes, I hung up and called back about a half hour later, and, again, waited on hold for 39 minutes. The Representative who answered was very nice, and after hearing my question, and doing research, he told me he would have to speak with a supervisor who would call me back withing 24 - 48 hours. The first person who called me back went to voice mail (my phone never rang), so I was unable to speak with them. The next person that called me back was on Friday 2/17/23, and they simply said that they were still checking into it and would call me back within 24 - 48 hours. They called back today, and again, their call went right to voice mail (my phone never rang). I called in to try and get an answer, and, again, waited on hold for 35 minutes. The Representative who answered was unable to answer my issue, and said she would have to bring in a supervisor who would call me back. I told her I would prefer to hold on since I didn't want another call to go directly to voice mail. After waiting another 5 minutes or so, the supervisor, EUGENE ID#231010, came on the line. He refused to read the notes on my file, and insisted that I go over all of the details with him again. He was absolutely no help, and was also very rude. After all of this, he told me the offers I was seeing were only for new customers, and he would offer me nothing. I said I guess I will look into going to Verizon, since they were offering promotions to new customers. I then hung up with this very rude and incompetant supervisor. About 30 minutes later, I received a message on my phone that said "sim card not provisioned mm2". When I googled that, I found that it meant that my sim card was deactivated. I went online to my business account to try and get help there, and it no longer recognizes me there. Therefore, EUGENE disabled my sim card without my authorization!!! I plan to go to a T-Mobile store tomorrow to get this resolved, but I am fuming mad at T-Mobile, and I would no longer recommend that anyone use T-Mobile for phone service. What happened to this once great company???