Google runs a virtual carrier in the States called Fi, through which customers can avail of interest-free instalment plans to pay for devices such as the Pixel 3. However, its support site is currently being flooded with complaints from such consumers who have had the full price for said phones taken out of their accounts.
https://www.notebookcheck.net/Some-Google-Fi-customers-are-being-charged-full-prices-rather-than-their-finance-agreement-rates-for-phones.420199.0.html