New Linkfly account is linked through Apple to my old account

See the following Apple articles:

View your purchase history for the App Store, iTunes Store, and other Apple media services

View your purchase history for the App Store, iTunes Store, and other Apple media services - Apple Support

How apps, content, and subscriptions from Apple are billed

How apps, content, and subscriptions from Apple are billed - Apple Support

Request a refund for apps or content that you bought from Apple

Request a refund for apps or content that you bought from Apple - Apple Support

• You can try to request a refund, refund only within 90 days.
• If you have requested a refund, you must wait until Apple has approved. Then you will receive a message from Apple.
• If your refund is approved, the funds will be applied to the same payment method that you used to buy the item.

See the following Apple articles:

If you want to cancel a subscription from Apple

If you want to cancel a subscription from Apple - Apple Support

If the subscription that you want to cancel is not listed

If you want to cancel a subscription from Apple - Apple Support

If necessary, contact iTunes Support for assistance. See the Apple Support articles below for contact information.   

iTunes Support – world wide   -

Apple Support schedule phone call     -

Billings and Subscriptions   -

Apple on Twitter