GSK & Company interview questions

After applying for the position, I received a two-hour assessment of the work at GSK. After finishing the assessment I received an email saying I had passed the assessment and will be contacted by the recruiting team for further steps. The next day I receive an email saying that 'unfortunately, we don’t feel you’re right for this role right now.' I tried to get more details but the email address 'workday@gsk.com' address was not found and my email bounced. This was very frustrating as I had put time and effort into not just application but also assessment and I am not receiving any valid feedback