The dedicated account manager is a Whatsapp Ecommerce Marketing Expert that helps you reach your Business goals. He is responsible for giving you all the best practices and techniques for a solid customer retargeting strategy on Whatsapp.
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Your account manager is also responsible for challenging you to always keep A/B testing your flows and trying new innovative campaigns to help you exceed industry averages in every KPI, with a major focus on ROI, customer Life Time Value and Average Order Size.

Meta fees are what you pay for sending messages via WhatsApp APi , unlike Whatapp phone APP Whatsapp API is not free of charge. It works like SMS, but better.
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Like SMS: Where you pay a fixed amount for every message you send to your customers.
But Better: WhatsApp does not charge you per message, the charges are per conversation. The conversation is defined as a window of 24 hours proceeding the first message you send. So once your campaign is sent to a customer, you can continue the conversation for free for 24 hours.

BusinessChat has no control over the conversation rates, they are defined by Whatsapp per country and per type of message. View Whatsapp rates.

No, you pay Meta fees for Whatsapp API, the same way you pay for Facebook ads using your Facebook manager account payement method.
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Make sure your Credit Card is always connected and contains enough funds to cover your WhatsApp API fees to avoid getting you Whatsapp number temporarily suspended for lack of funds.

Contact import can be automated or manual.
The automated part is done by connecting your Ecommerce Store ( Shopify, Salla or Zid) which will automatically add your Store contacts to BusinessChat and keep them updated.
If you have other contacts, you can upload them to your BusinessChat account with a CSV file.
Make sure to always add opt-in contacts to maintain a healthy database.

Short answer : Except for WhatsApp team, no one can give you approval for green tick.
Long answer : Unlike social media platforms, Whatsapp green tick is not something you can buy with monthly fees. First, you have to be using Whatsapp API services and actively sending campaigns and receiving messages on your Whatsapp API. Then, you can apply by filling a form.

Here is a detailed article about the process, requirements and best practices :
WhatsApp Green tick full guide

Unlike unofficial WhatsApp solutions that use QR code scanning for activation, BusinessChat is an official partner of Whatsapp, and we use WhatsApp Business API official channel.​
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By using our platform for your marketing campaigns and automation, the risk of getting your number blocked is non-existing as long as you comply with Whatsapp's anti-spam regulations.