Are you using the app? If so, uninstall the app.. logout the Google account and login to a different one, reinstall IG and try again. Probably should let the accounts rest for 24-48 hours in between app installations. It's best to use a different IP and device if you're going to be using multiple accounts if you're doing any type of spamming.. which it sounds like you might be doing sending multiple DMs. Make your messages unique and for safety. If you're doing this all manually.. send a DM without a link first, wait for a reply then send a message with the link so it's a conversation and not a spam message. Should be enough tips, if you need any more help feel free to DM me and I'll respond when I get a chance.