Vodafone allows harassment to continue through the same representative

Got a call from the same person Sunil (01171272522) who had intimidated me on the 21st and had deactivated my phone number ( after barring of calls before that ) because I communicated to him that I would be porting my number ! His stand remains the same ! I have told him to email me as I will not suffer more mental harassment on the phone... I can't understand why after repeated requests to have written interactions on Vodafone social media page and my petition, Vodafone is making the same people get in touch with me who have spoilt the case and are refusing to investigate the matter or send an apology letter even now ? The fact is that I had submitted updated documents and their staff had verified it in June !