No. eTA is a mandatory entry requirement. You should not travel to Canada until a decision is made on your application. If you are leaving for Canada soon, you may want to consider rescheduling your flight.
If you are not sure how to submit the documents requested for your eTA application, follow these step-by-step instructions.
If you are waiting for someone (police department, doctor) to send you documents, or have problems uploading the documents and cannot submit them by the deadline, complete this web form to request an extension to the deadline.