You do not seem to understand the audit process or quarterly review procedures for a PCAOB audit firm. A firm like Shinewing is not just going to be listed as a companies auditor and as having reviewed financials without doing the standard level of work that they would do on all engagements. There is a strict process for these types of things.
And greed, sure, but the questions is still why go with a top flight firm and not one where you can exert some influence over and get what you want? Shinewing would not hesitate for a second to contact the SEC and let them know what is going on as Shinewings reputation is at stake.
As far as getting an answer, not sure where you live but remember that Matthew is located in Australia, its 3AM right now in Melbourne.