WebPlanex: GST Invoice India

The application is fine, but I repeatedly kept getting messages on my PERSONAL WhatsApp number saying that the plan is close to being over or other issues. If I am not mistaken, initially it was free for 100 orders a month, then they changed it to USD 5 for the first 100 orders also. Ultimately I don't really care what they do with their own pricing as long as they don't message me outside of Shopify channels. They can set their limits, not allow me to download invoices, whatever, but sending me WhatApp messages outside Shopify is unacceptable and seems blatant misuse of personal information shared.