I'm sorry to hear that, I also had this problem and I didn't know what to do at first.
The most painful thing was the fact that for a long time I worked intensively to promote my account, I even looked for how to buy Instagram likes from https://famoid.com/buy-instagram-likes/ and did everything possible to increase the number of followers. I was scared that I would not be able to restore my account, but I still managed.
I searched through their help page and it wasn't that hard. I hope you will succeed too.