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It seems like the modem is stuck in attempting to configure automatically. Normally this should take between 15-30 minutes. So if it's beyond 30 minutes already, you may need to do a manual configuration. You can refer to this guide: How to set up your TP-Link VR1600v modem.
If you're still having trouble, kindly provide me your customer ID or username for this newly installed service via PM since the account I'm able to pull up using your community details seems to point to a different record. If you're unfamiliar with how to send a PM, visit this link.