By Dhanya Skariachan, Dhwani Pandya and Praveen Paramasivam BENGALURU/MUMBAI/CHENNAI, India (Reuters) – Hit by tough regulatory crackdowns, Indian e-commerce giant Paytm is mobilizing its sales team to reassure merchants who use its app to accept digital payments, even as Walmart and Google target those same merchants with rival offerings. Once cash was king in India, […]