Who called from 5077884313

Text from this number that said "hello, (my name) haven't spOken in awhile". When I texted who it was, they replied "LOL add me to Y! Msg, my ID is textgirl131".  Spam

Got the same thing, except they said they were "textflirt7"...just don't respond to it

Got a similar text and when i asked who it was, I got the response "lol if u want to know who this is you gotta add me on Y! messenger. My name is textiegirl**". This person knew my name.

HOW DO THEY KNOW MY NAME!!!!  HOW & WHY DO THEY CALL ME????