Charged for Apple TV+ one month into free one year offer
I bought a iPhone SE 2nd Gen on March 24th, 2020 and remembered to sign up for the one free year of Apple TV+ on June 11th, 2020: within 90 days of the purchase. However, it seems I only got one week free and was charged $4.99 on August 11th, 2020 on Apple Cash. Apple has since tried to charge me 10 times over the past month, but they've all been declined due my Apple Cash card having a balance of -$4.99. I signed up for the one year offer through the banner in my iPhone's settings app, but for some reason the offer still appears on my iPad. Is this something I can fix on my own, or do I need to contact support?
iPhone SE, iOS 14