If you have subscribed to your Fddb Premium membership as an in-app purchase, the subscription will be processed via your Huawei account.
Unfortunately, we cannot cancel your subscription for you, as Huawei does not give us access to your subscription or payment details.
Please also note that uninstalling the Fddb app or deleting your user account will not automatically cancel your subscription.
You must always cancel your subscription manually with Huawei. This is done as follows:
1. Go to your phone settings.
2. Tap on your account.
3. Tap on "Payments and purchases" and then on "Subscriptions".
4. Select the subscription you want to cancel.
5. Tap on "Unsubscribe" and follow the further instructions on the screen.
You can find instructions here:
https://consumer.huawei.com/en/support/content/en-us00729195/