"Going to NSA IG or the PSCI's in Congress are protected"

Protected and utterly pointless. Congress already knew what was happening. The NSA's IG is not an unbiased observer.

Unfortunately, the official channels are broken here. You have members of Congress talking about how these revelations are just the tip of the iceberg. That means that they know more, that they know details that will shock people, and that they are doing nothing about it. What good would it do to go to them with this information?