>>  Can't we report this to AT&T or a government agency somewhere <<

Yes, if it is truly a scam, you can google for a list of (mostly government) sites were you can report those scams, or learn more about them.
http://goo.gl/8aFOJk

However, it might be quicker to buy a call blocking device or app... you can google for that too!

Same as everyone else, faxing to our voice number.  

It is a spam, it said your credit card has been  temporarily suspended. To unlock your account, click here.
Http://tdcanadatrustloginpage.Com/cc/

first of all, canada trust dont text you in regards to credit suspension, they will suspend and you have to chase and find out. I knew this was fake and guy was fishing so i blocked him/her.