First and foremost, please make sure that you read and understand Shopify's terms and condition related to app charges.
Secondly, please note that as app partners, we do not and can not initiate charges. We only provide app offers and once approved by you, the merchant, on the Shopify's consent screen, it's passed onto Shopify billing systems, which would initiate charges based on what had been approved, according to above-mentioned terms and conditions. App partners don't have any control whatsoever of when or how much the charges are carried out for, and only receive a fraction of the total amount through a separate agreement with Shopify as app partners.
Having said that, if you encounter any billing related issues, we will try our best to support you with. Please provide us with evidence at your earliest convenience. This will allow us to investigate the underlying cause and liaise with Shopify to resolve it for you.
If you got charged during trial period, most likely it's because the trial had expired according to Shopify's calculation (which could be down to the seconds but not just days). If you see 2 charges on Shopify bill, it's most likely because you have upgraded / downgraded during the billing cycle, and received charge items for each of the subscriptions accordingly.
