Today we got an e-mail back from Guangzhou stating that we have not provided the documents they required yet we sent in on march 16th. Also they said we are using the wrong case number. Ours starts with GZO But they said in e-mail to use correct case number which is different and starts with GUZ The GUZ number says visa approved on CEAC sight. Is it best to call DOS on this and see whats going on? I was worried the shifting ways would cause documents to be lost. Any ideas or suggestions would be appreciated Thanks in advance