Hi Akhilesh,
the queue name created by the SAP CRM middleware in SMQ2 depends on the configuration of the CRM middleware itself. Therefore, there is no function module available that can provide a complaint ID based on the the queue name. However, usually the queue name consist of some prefix an the ID of the business partner or the ID of the one order object. As an example consider the following queue name:
CSA_ORDER_0000292963
It consists of the prefix "CSA_ORDER_" and in this case the ID of an activity (292963).
If you can't identify the complaint using this approach the easiest way is to debug the failing LUW to find the ID. As you've mentioned that you get a lot of errors in SMQ2 it seems that there is a general error. So I'd suggest to try to identify this error by debugging a few queue. Once you solved the underlying error you can simply restart the queues without the need to analyse every single one of them.
Best,
Christian