Unable to download apps after I cancelled all my subscriptions on App Store

Hello~ Go ahead and contact Support or try adding a new payment method…

Add a payment method to your Apple Account - Apple Support

If your payment method is declined in the App Store or iTunes Store - Apple Support

~Katana-San~

Hello~ What happens when you try message? In the meantime…

If a message says 'Your Media & Purchases account has been disabled' - Apple Support

Post back if this isn’t your issue.

~Katana-San~

Try making sure you have a working Apple Account/Apple ID (same thing) and make sure you haven't gotten in trouble on this account either. Make sure both of those are good, and update your phone to its latest supported software for good measure.