TikTok complaint: Bullying through live feed contents

My friend has suffered a tremendous amount of bullying through a live feed session where a young woman was calling him a pervert and a disgusting person he has never done anything wrong in this platform or and such platforms she lives close by to my friend and the bullying is not only on TikTok but also outside on the streets whenever she she him she confronts him with degrading words my friend suffers with mental health and has now made himself in to a recluse who does not want to come out of his property in fear of seeing this woman I have reported the accounts for him but nothing seems to be done as once one is banned she then uses one of her other four accounts I can’t understand whe they are allowed to use other accounts once one has a life time live ban surely there should be safety measures in place so this cannot be repeated from another account any help you could give us would be really helpful and hopefully and would definitely help my friends mental health thanks I will screen shot the said accounts