Instagram Suspended My Account After Using My Email for Another Account

My Instagram account got suspended out of the blue, and now it just shows "Complaint Help Centre" on my profile. I can't see any of my photos or stories. I’ve never posted anything on my account that could be seen as violent, hateful, or inappropriate. The only problem is that I used the email address connected to both my Facebook and Instagram accounts to help my partner set up an account. This feels really unfair since I've had this account for so long, and it has so many memories and important stuff on it. Please close the account I set up for my spouse and reinstate my original account as soon as you can. Thanks!