77893

The text is from a SMS "short code".
Short codes are a premium service to the SMS industry, they cost money to have the code issued, are traceable, and are regulated. It is not in the best interest for a short code to be used in spamming, the code can be pulled and the spammer will be out the thousands of dollars it cost to get a short code.
DO report the spams to your cell phone provider.

Contact your cell carrier and report the number as a nuisance number and request it be blocked. Inquire if they offer a service to black list numbers so they can not call or message you at all, Verizon lets you block up to 5 for free.
Also inquire if you can forward the text to 7726 aka SPAM:
http://www.fcc.gov/guides/spam-unwanted-text-messages-and-email
"Do not respond to unwanted texts or emails from questionable sources. Several mobile service providers will allow you to forward unwanted spam texts by simply texting it to 7726 (or “SPAM”) to enable the providers to prevent future unwanted texts from the specific sender. "

If you have a smart phone, there are many anti-spam apps. Check your phone's app store.

The message I got said that I was receiving a cash advanc

They're from his girlfriend

She's back