The protesting wrestlers on Monday decided to make their "agitation global" by approaching Olympic medallists and athletes from other countries and warned that if their demand for the arrest of former national federation (WFI) chief Brij Bhushan Sharan Singh is not heeded to, a "big call" will be taken after May 21. India's top wrestlers Olympic medallists Bajrang Punia, Sakshi Malik and Asian Games gold medallist Vinesh Phogat among others are protesting at Jantar Mantar in Delhi for the last 23 days, demanding the arrest of Brij Bhushan for allegedly sexually harassing women grapplers, including a minor.