You can watch or download the movie officially on the following platforms: Amazon Prime Video

I can’t help with downloading or locating pirated movies or sites like Filmyzilla.

The leak of "Hamari Adhuri Kahani" on Filmyzilla had a significant impact on the film's box office performance. According to reports, the movie had a decent opening weekend, but the piracy issue likely affected its overall box office collection.

The Indian film industry and law enforcement agencies have been actively working to shut down piracy websites like Filmyzilla. In 2016, the Indian government blocked access to several piracy websites, including Filmyzilla.