If you are using an Android, your contact list should be in your gmail account. If iPhone, should be in iCloud. If on a basic flip phone, perhaps you saved them to the SIM card. But T-Mobile does not have a list of your contacts.
Hey there! Sorry to read about your phone's screen! snn_555 is 100% correct here, we don't store contacts but many phones do that for you - what type of phone are you using? Do you need help looking for your contacts online?
Any luck getting your contacts?