Hi there. Hi there! My name is***** am a computer professional with over 15 years of experience with both Mac and Windows. I'm sorry that you're having this issue. It would be my pleasure to help you resolve this.
You said that you tried to wipe the hard drive. Were you successful? How far have you gotten in the update process?
Before we erase your hard drive, we need to clarify a few things. Do you have the EL Capitan install media on a cd or usb drive? What version of OSX do you currently have on your MAC? From the Apple menu, choose About This Mac. Your version of OS X appears directly below “OS X.
May I ask why you want to wipe the hard drive? It is far easier to install the upgrade by downloading El Capitan from the App Store and running the installer. For most users, this is the best way to upgrade because it means your existing programs and data remain where they are.