If you have issues with your data card recharge, contact your operator on numbers given below:

Airtel data card
Dial 121

Vodafone data card
Dial 198

BSNL Data Card
BSNL mobile all India helpline : 1500
If you're dialing from a different number: 1800-345-1500

IDEA Data Card
198

Tata Docomo Data Card
Dial 198 or 1860-266-5555