I meant those marketing guys, who give some forms to fill for luck y draw etc. Many times its hard , as they don't give bill unless one gives mob number.
I sms/whatsapp b0mb@rd them . Just google sms / whats app b o mb.
Biggest revenge will be on sbi or any cc customer support handles, post their numbers asking some credit limit enhance or some credit card, other scammers lurking for these literally devour them with hell lot of spam calls.