How do i switch payment method?

I want to switch from credit card to PayPal account, however, i can’t find this option in the Billing Information page. I’ve read in older posts that to solve this i must go to this link: Login - LingQ, but when i click it, it appears to be a blank section of the User Settings page.

Unfortunately with our current payment system it’s not possible to switch between payment methods while subscription is active. You will need to cancel your current subscription, then after it expire, you will be able to subscribe again and choose the PayPal as payment method.