There’s impeachment. There’s also ‘contempt of Congress’ charges Congress can make and also have the Sargent at Arms detain individuals, no?
Impeachment only applies to judges, the president and vice-president and some other executive officers that have to be approved by the Senate. That is an option, but only if they can find enough evidence to support the charges. Since they are still in the investigation process, they do not have enough to support impeachment.
As far as contempt of Congress, that is something they could do for a short time, but would have little long-term effect, I fear. Generally, contempt of Congress charges are referred to the DoJ for prosecution, and this DoJ has refused to pursue any charges from Congress.