Is the purchase a one-time payment?
Premium+ is a subscription. That means, when you subscribe to it, money will be deducted from your account based on the subscription you choose -either quarterly (once every 3 months), or yearly (once every 12 months).
Please note: Sygic app versions older than 20.6.6 may offer a different type of subscription than described above. Please refer to this article for more information.