Paytm - One of the most popular payment gateways in India, known for accepting online payments through a variety of payment sources including debit/credit cards, net banking, Paytm wallets, and more
Razorpay - A trusted payment processor that offers a secure platform for processing credit/debit card payments, UPI, and several mobile wallets
Cashfree Payments - Recognized as one of India’s leading payments and API banking companies, supporting over 120 payment modes including credit and debit cards
PayU - A comprehensive payment gateway that facilitates online transactions, known for its wide acceptance of different payment methods
Instamojo - Provides easy setup for businesses to accept payments online, supporting various payment modes including credit and debit cards
One of the se should work well for your legitimated business.