Hi,
I found an error in your plugin, I have 3 active payment gateway on my site:
1. cash on delivery.
2. Qisstpay.
3. Alfalah card payment.
by default cash on delivery is selected Qisstpay radio button is fine when I click on it after cash on delivery but the error occurs when I click on it after Alfalah payment radio button both radio buttons are selected.
here is screen short of errorScreen short