Delete Disney+ Account

I want to delete my Disney plus account but their app and website force some ad for their latest subscription deal. My account settings are not accessible anywhere. When I am logged in and refresh the page, I can briefly see my avatar in the top right corner before the ad comes up. According to Disney's instructions, I need to use that to access my account configuration and delete it.

Is this a denial of my right to erasure granted by the GDPR? Should I report this to some authority? If yes, who is that authority?