Issue in submitted I-765 for OPT STEM Extension

While submitting the I-765 there is an error in the form. I filled the Employer’s EIN instead of E-Verify number in one of the questions. I have filled an e-request but haven’t received any response. Is there any way to cancel that application and start from scratch as I still have a few weeks till my original OPT expires?

Did you already filed online or is it that the form is filled in but not filed?