Hey guys. I once apllied for an internship in a certain Industry which after, I was asked to report officially on a certain date since everything was okay. Unfortunately when I reported the very day I...

I'm sorry to hear about your experience; that sounds very frustrating. There can be several reasons for what happened:

Miscommunication: It's... possible that there was a misunderstanding between departments or individuals. The General Manager may not have been informed about your acceptance or the status of the internship positions.
Change in Staffing Needs: Sometimes, changes in hiring decisions can occur due to shifts in company priorities, budget cuts, or restructuring, which might result in the cancellation of previously approved positions.
Administrative Errors: There may have been an administrative error that led to your application being processed without a corresponding confirmation of a position.
Policy or Protocol Changes: The company may have made changes to its internship program or policies that were not communicated in time.
Internal Issues: There could be internal issues within the company, such as turnover or unexpected departures, leading to confusion about available ro more