Trending @Infosys; Not going to join infy

I have accepted infy offer 2 months back but now i retained by my current employer so i am not going to join infy now. Even i haven't told infy that i am no longer going to join infy. Is there a way i can keep their offer for next 6 month and then i can resign from current employer and join infy. And what happen if i dont join now , if this case then will info blacklist my profile and i cant join infy in future, is it true?