That Number doesn't register on either phone so wasn't made from here on my phones so I'm not paying it.

Which phone did the charge appear on?

What day and time did the text allegedly get sent?

In your self serve usage page does it show texts received from that number?

The bill page shows number but phone does not had incoming and outgoing according to statement but number not on phone at all no record.

Yes I understand. 

But Which phone did the charge appear on?

You mentioned there is more than 1 line on your account. 

What day and time did the text allegedly get sent?

In your self serve usage page does it show texts received from that number?

I just got off phone with agent even they didn't know how it happened so they took it off my bill.. and the phone it was supposedly done with has no record of that Number not even in history search. But it's fixed now

​@Ivanma 

The usage section shows there are two outgoing text messages sent to that number and two incoming text messages.

Was there anyone else having access to your phone that time when the usage appears in self serve?

Flo nope just us ..the number doesn't even register in phone even did history search so like I told agent no way it came from this phone. You can come look for yourself i told her ..She removed the charges