Well, I guess I can chime in here...
Without knowing a specific RA number, I'm not able to give any specifics to this return. However, i'll let my warranty team handle that directly with you via phone/email. One of the best ways to find out the status of the RA is to log into your account and go to the Returns (RAs) page. It has a status updated. If that doesn't have enough info, just give us a call.
Once we receive an return we typically let you know what is going on in about 3-5 business days. That just depends on how many returns we have at the time or the complexity of the issues we are dealing with. Keep in mind we have an entire warranty/returns department that checks out each return sent back to us and we bench test amps as needed.