Vodafone India — outgoing sms blocked

Address:

0431

Hi, im vignesh, last one week my mobile ([protected]) out going message was blocked for sms. I asked to customer care they said that i need to register with trai. Actually i did not do any kind of marketing. Everyday i will send messages to my friends and relatives only. Without my knowledge they blocked. How to un block? Pls help me soon. I am loosing my customers.
Pls do the needful.