You cannot contact Instagram support. This option is now not available on Instagram. You can take any help in help center where you can get every information regarding the problem. On browser, you can use this link to get help - https://help.instagram.com/
Tap the profile tab in your app in right corner at bottom. Tap on the three bars at the top and choose the setting option. Tap the help center. Here, you can get every information. Just follow the points according to your problem. Here are many guides which can help you.