Otherwise just shut down all your phony "investigations" and go away.
If found in Contempt the person can be arrested under a warrant of the Speaker of the House of Representatives, by the Sergeant at Arms.
Joseph Storys Commentaries on the Constitution, Volume 2, § 842
Anderson v. Dunn - 19 U.S. 204 (1821)
And, as to the distance to which the process might reach, it is very clear that there exists no reason for confining its operation to the limits of the District of Columbia; after passing those limits, we know no bounds that can be prescribed to its range but those of the United States.
Jurney v. MacCracken, 294 U.S. 125 (1935)
73rd Cong., 78 Cong. Rec. 2410 (1934)
Rules of the House of Representatives
Rule IV Duties of the Sergeant at Arms
 execute the commands of the House, and all processes issued by authority thereof, directed to him by the Speaker.