India won two bronze also through Chitra Magimairajan and and Varshaa Sanjeev in the women's team event and Shivam Arora in the men's individual section.
The sixth-seeded Pillai and Sanchis stunned two-time IBSF champion Ng On Yee and So Man You of Hong Kong -- seeded fourth in the tournament -- 3-2 (23-74, 68-41, 51-46, 4-64, 55-36) in the final.
The Indian duo had beaten their England counterparts 2-1 in the semifinals.
In the men's individual section, Shivam Arora lost to Duane Jones of Wales in the semifinals 5-2 (55-14, 0-43, 16-33, 38-06, 27-36, 22-36, 01-39) to secure a bronze.