Instagram — instagram privacy and safety

There are two id's of instagram which was pooja4389 and jazz_9612

One girl is using these accounts

Pooja4389 convert to pooja4389_ and now pndit456

Jazz_9612 convert to jazz_789_

Lolz i cant understand i already closed account which was jazz9612_

Again she is continually changing account username and adding unwanted

Person

The incident is still going since one month. Kindly close this account as soon as possible

Please recheck ip of both accounts who is using..

I know she is an girl.