Vodafone — Harrashments

I was user of vodafone and due to company policy i had dispute regarding my bill. i asked company to rectify their fault but inspite of correction they barred my number, and i switched to another company. now i am rcieving fake calls from some persons saying i am calling from tis hazari court and company launched fraud case on me, talk to lawer, they are harrashing consumer mantally so ristrict action should be taken so that mentally harashment should avoided. if they are claiming something should contact at customer in written.