The official voice of the company is its public information and promotions officer. The CRS's are certainly not the official voice of any major corporation. To believe otherwise is foolhardy at best.
The CSR's are the people customers are supposed to contact for information about their service. If the information customers get from CSR's is unofficial until the customer gets verification from someone else in the company, they are of no use to the customer. Some may argue that this uselessness is self-evident. I say it should not be.