Being charged fees and taxes on old addresses

I had noticed this charge and made contact via the support line ending in 8997. The customer service rep did not ask me why I was calling, just started with giving me my balance. I explained that my account is on auto pay, and I had a question about this item on my bill. They first told me there were no taxes and fees included in my bill. I assured them there certainly are line items, in a section titled "Taxes and Fees"

I drew their attention to the address information, once I had my chance to speak. This was only after they assured me that even though there is a listing for taxes and fees, these charges were no being paid extra for, as they are included in my bill. 

I explained that it was really frustrating, being told that a line item that is clear with an associated cost was included in my bill, as though it is not part of the monthly charges. 

Each time I offered my response to their statements, I was put on a brief hold so the person on the other end could listen and try to understand what I was saying. 

I am paying two separate charges of $1.50, one for the address where I live now, and one for the address I used to live when I opened my account with Nextel (who then was purchased by Sprint, who was then purchased by T-Mobile) 

Have not lived at the other address in over 20 years!!! so this means I have paid over $350.00 for nothing! 

Who do we need to talk to at T-Mobile to get this resolved?? Does it really need to become a class action lawsuit? 

How much of their 19 Billion in revenue is due to small charges like this that go unnoticed? 

Seems to me the people in customer service are well aware, and do nothing to help get these charges removed and the customers reimbursed!!