IndianMascot
Addicts
Actually before going through legal procedure, you have to get this matter highlighted before the Current Service Provider. So, You will have to register a complaint against Current Service Provider i.e Tata DoCoMo and simultaneously highlight the same to TRAI.
A brief procedure had been posted by me on Post No #37
https://broadband.forum/national-customer-call-preference-registry/72848-file-complaint-spam-sms-call/4/#post549625
A brief procedure had been posted by me on Post No #37
https://broadband.forum/national-customer-call-preference-registry/72848-file-complaint-spam-sms-call/4/#post549625