To change your payment method on Frndly TV, check out the following video tutorial!: https://mybundle.tv/insights/managing-your-frndly-account-a-quick-guide/
Additionally, for more assistance on that, check out this link from Frndly's help page: https://help.frndlytv.com/support/solutions/articles/48000601664-update-payment-credit-card-information