Please cancel my iCloud backup.

See the article View and manage iCloud device backups - Apple Support

View and manage iCloud backups on your iPhone, iPad or iPod touch

1. On your iPhone, iPad or iPod touch, go to Settings > [your name] > iCloud > Manage Storage > Backups.
2. You see the devices with iCloud Backup turned on.
3. To delete a backup, tap the name of a device, then tap Delete Backup.