There may be some issues with UPI payment with Indian Crypto exchanges in the last few days. But I still trust WazirX the most because it is backed by Binance. I am not saying that other crypto exchanges are fraud or anything but WazirX has Binance to back them. Even in 2019 when around 7000 BTC were stolen from Binance by hackers, no user suffered any loss. Such incidents build a sense of trust with binance and it's being the world's largest crypto exchange so it got advanced security technology and reputation to protect to be at the top.
Rest I believe if the Indian govt ban Crypto, in any case, they will definitely give an ample amount of time to withdraw the funds or transfer it to decentralized walllet.