Who called from 7808010640

Got a text from 800-300-4400, which is referenced all over the place here, in the text is said:

D I R E C T-Express alert.  Call 780-801-0640

Obvious scam, so search the 800-300-4400 number and call or email FCC, reference both numbers you find in the search!!  The 800# has been around since 2008 At least

Got a text that says to call this number, D I R E C T - Express Alert.  Sadly, we even get this on Nextel units that don't have phone plans.

Mastercard is locked due to security issues.  Call 1-780-801-0640

Rec'd a text message "Direct Express Alert.  Your mastercard is locked due to security issues.  Call 780-801-0640.  ?? who are these people

I've had several of these type messages with different numbers and messages. Reported it to Nextel a month ago but they just change the numbers and messages and I have started receiving texts again. Suggested I text STOP to the numbers and they are suppose to stop but who knows???