Changing your company display name
During onboarding you would have added up a company name. By default that is used to show on your invoices and payment forms.
If you want to show a different name you can do it here https://paymentlink.io/dashboard/branding/logo
Always remember to Publish Changes which is the button on the top right of the screen if you've made changes to your branding section.
This does not affect what is in your account settings page. This is just the display name for your company.