How can I contact T-Mobile Corporate Office?

Skanuch wrote:

I would really request that somebody calls me back to discuss the way I was treated by one of your managers. It's disgraceful to the company and looks very bad for T-Mobile. You have a great reputation and everybody else has been fantastic but this one manager stood out and has been a  thorn in the side for T-Mobile trust me.

This is basically a user to user forum with some Tmobile moderation that doesn't have account access so a lot of people use messenger on one of Tmobile’s social media accounts like Facebook or Twitter.