No Service Backup? Must be my mistake

Good Day Samsung.<br> I Google Internet Support, and get an \email address\" but it seems to be not valid.<br> I don't want to see this as a complaint, I just need some help.<br> I'm sure my new Galaxy Tab E is going to be GREAT, that I can see. Only problem is I can't connect to my home WiFi.I get Authentication Error Occured repeatedly.<br> I have WiFi. My Cell phone uses it every day. I set it up.<br> So I'm sure I'm just not fami**** with some or other requirement with this new device.<br> So I'd apreciate feedback. I live in Randburg. Perhaps there is a help location I can go to.<br> Looking forward to your response."