Unfortunately, there is no option to change the status of your last edit. You have to wait until it gets applied or not applied. This is something we can not change.
For future reference, I’d recommend you to check the edit and submit it.
As indicated by @deepakjhic , there is no way to revert an edit, until is pending.
There are two options for you:
Wait for the feedback from Google Maps and, if the edit will be approved, edit the place again.
You can also “send a feedback” that you will find scrolling down your menu on Google Maps, using “your opinion …” and explaining that you did the edit by mistake. For more details you can read: Report an error on the map