Taarak Mehta Ka Ooltah Chashmah S01 E3745 Is The Coupon At Risk?

"Problems Toh Hain Sabke Saath, Bas Nazariye Ki Hain Baat!"

Jethalal is ecstatic to inform Babita about her being able to receive the car on her preferred day. Later, Jethalal calls Taarak in agony, asking for help on a situation with the coupon. What is it regarding?