So you are claiming that the NSA (at all levels) lied to the House Intel committee? That's a big claim, you should back it up with some evidence. Which part of the report is not accurate?
Have you read the report?
You’re missing the point. The NSA has an undeniable track record of illegal and dishonest activity that is easily googled. Nothing has systemically changed since those actions and until it does there’s no reason to place confidence in anything they say
Isn't it confirmed that they've lied under oath to Congress before?
It is confirmed they have lied under oath to Congress about the very thing Snowden blew the whistle on.
So yes, they are perfectly acceptable sources of information regarding Snowden.
Since lying to Congress is a crime, who was charged?
Being charged with a crime would require the people who could charge him actually wanting to charge him. If congress wanted him to lie in the way that he did, clearly they wouldn't charge him after the fact.
Director of National Intelligence James Clapper told Congress in March 2013 that the NSA did not collect data on millions of Americans, just three months(!) before Snowden and Greenwald revealed the classified NSA documents proving otherwise. [0] The heads of the intelligence agencies will say whatever they need to say to get what they want. Lying to Congress and the American people is business as usual for them.