Where is my account ?

Since the end of March I’ve been on medical leave and my benfits pmt was anything but smooth so.. I got behind on my bill HOWEVER .. I made a 331.00 pmt and my line turned back on . The 7th another one hundred and something, my money came in on the 9th and when I went to make my pmt it’s like my account had disappeared and as if my number never existed. I love my service with T-Mobile and I would like to pay my bill and continue on. I don’t know how im suppose to do this , like 611 doesn’t even work.. 

what do I do ?!