Ms Oni said officers were incompetent "to kind of accuse me of doing it to myself, when I've said somebody has followed me from my workplace to my home".
"I even got told that they watched the CCTV footage and they saw no-one following me," she said.
"We've all seen the CCTV footage. There was a person in a veil following me.
"Why was this not found in the beginning? Nobody has answers to tell me."
More top news
Muhiddin Mire cut the throat of a stranger at an east London tube station "in revenge for the fight against IS", a court heard.
Rory Geoghegan claimed the lack of support he received from the Met shows how frontline officers are being taken for granted.
A registered sex offender who admitted grooming a 14-year-old girl and then sexually assaulting her has been jailed for over four years.