Received text at 2:06 AM "add my yah00 so we can talk"! Replied with "stop", supposed to stop unwanted scam/sales texts - hope it works.

It won't. All it will do is confirm that you have a working number.

Forward the text to 7726. It will be investigated and blocked by your cell phone carrier.

recieved the same message at 10:13 pm. said they where jen and wanted to chat.

I received the same this morning

I got the same thing.  But I thought it was someone I just met that I"m pet-sitting her pets so I said okay and did it.  I didn't know her cell phone number cause I deal with her partner so I figured she wanted to talk to me about the pets.  lol.  no, apparently she's just horney and wants to chat.  obviously that's not the Jen I thought and I deleted that contact.