I keep gettting text messages from UNKNOW numbers this was one.

Sender:  "Hii ;D" Me: "Who is this?" Sender: "Lets talk on Ya-H00 msngr Screen-name is sofiachick41" Me: No Stop texting me!"  Sender: "Do you remember who I am?? A.d me to refresh your memory" Quick a.d.d me I'll be waiting on u !"

Anyone know how are they getting my number or how can I stop these unsoliciated text messages? Anyone I can report them to?