need help with contacting TMobile corporate office

To get in touch with the corporate office of T-Mobile they don’t just plainly tell you because you need to follow the dispute process as outlined in the terms and conditions of service fir small claims or arbitration unless you have opted of within the allotted time frame after the signing of agreement in terms of service. 
you can write then regular snail mail at the alberquerque New Mexico address and one of the corporate leadership team will contact you within the 10 days that they have to respond to your grievance for resolution. They will with contact you via telephone, email or in writing from the office of the president from the Bellevue Washington address. They usually resolve and remedy gripes and grievances very well before the 10 days that they morally and legally are bound to do and saves the day.