something went wrong during purchase?

Subscription Full Access to PRO
App djay - DJ App & Mixer
Content Provider algoriddim GmbH
Date of Purchase Dec 19, 2018
Introductory Offer $9.99 for 1 year
Subscription Price $4.99/month starting Dec 19, 2019
Payment Method Visa … ****

After the trial ends, your subscription will renew at $4.99 unless canceled by Dec 18, 2019.

I thought i was getting the yearly introductory price??