Google Pay not an available option

I really, really want to avail the premium service, and on the help page it says that Google Pay is an available option (I don’t have a credit card, please no, most people here are students, why would we have credit cards), but when I go to avail premium, the supposed Gpay button is not there. C’mon. There’s a lot of people who want and will pay for premium because this service is genuinely good, but your payment system is blocking us. Please help or add more payment options.