Thank you for your reply.
I got a email form USCIS saying
The status of this service request is:
On 02/25/2019, you contacted USCIS concerning your I-539 to notify us that you believe your case is outside of our normal processing time. Below is a summary of what we found and how the issue has been or may be resolved.
The processing of your I-539 is within our current processing time. Please see our Web site at www.uscis.gov for processing times.
I confused about with in our current processing time, My received date is august 9th 2018. The USCIS current received date for SR august 18th 2018.
California Service center ( H4 to F1 COS).
Do I need to raise another service request?
Could you please help me?
Thank you in advance.