You stated the campaign is already "DCA approved". If this is the case, you can go ahead and:
Buy a number and
Add the campaign using the Sinch Customer Dashboard.
If the campaign is showing as pending in TCR, Sinch still needs to review and accept it first. There is a backlog right now of pending campaigns so this may be causing the delay.
If you still have issues please escalate to your Sinch account manager, or contact Sinch Support.
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