After you file

I've been waiting for 14 months now. Still under review. I was told the W2's didnt match I dont even know how this could happen. The information is auto populated when filing online is it not? Meanwhile they get to tack on interest while I make payments on the current years tax return.
This should be illegal to do people.
I'm livid!
Everytime I call it's another 60 days!
WTF?!?!?!!!