So recently I've become a victim of SMS/Call bombing after getting an individual removed from a What

So recently I've become a victim of SMS/Call bombing after getting an individual removed from a WhatsApp group Here's an article about the same: https://indianexpress.com/article/technology/tech-news-technology/sms-bombing-what-is-it-and-how-to-stay-safe-8050074/nnAll I have at my disposal is the harasser phone number and the timeline from he started calling and texting me, until I blocked him and then suddenly the SMS bombing for which I've received thousands of SMS and calls. I do understand these companies whose services have been misused to harass me log the IP of the perpetrators deviceWhat are my options?nI'm looking for legal help to file a case and further pursue this matter. nI'm located in Pune, MH and I'm a foreign citizen currently employed in India.