Dear Mr. Hasan,
Greetings of the Day!
We tried to contact you via phone and emails, however we haven't received any response from your side. We understand that you might be busy in some important work and we do appreciate hard working people.
Therefore I request you to please spare some time and send us one email regarding the status of your decision.
We are very excited to work on this project or other. I hope you understand my position as well.
Therefore I request you to revert and share your feedback so that we can proceed accordingly.