Still getting F451 Error on Browser & Phone App

Just made an account after googling the customer rep number given to me by chat. Our account is from sprint and since the transfer, it's been nothing but headaches. 

I was able to log into my tmobile account before and a week ago. I wanted to log in a few days ago to check my bill. As i logged in, it said my account security was low. To add either mobile auth or a phone SMS.

 I decided to put SMS and now any time logging in username + Pw and then prompting for SMS text, i get the same error. different phones, browsers, adblock, no adblock doesn't matter.  Chat has been useless, saying they would transfer me but never do. Say to call number but also useless. Might have to just leave all together and take our phones else where. Seems the account will be disabled since we can't pay. 

Servicio no disponible.

F451 : Uh-oh, it looks like we have our wires crossed.