Crappest network in the industry

I need to get on to T-Mobile again, but what will I get told? Exactly the same thing, because costumer services don't have another thing to tell me other than take it to a T-Mobile store... I'm dying to use the brick as I did before, except since it's broke down in a french destination I've been left unable to use key 7. If you have alternatives of what else I can do to get it diagnosed, please leave a comment here. T-Mobile is the crappest network in the industry, I have to say