Complaint Review: Grand Canyon University - Phoenix Arizona

I will start with the main problem and the rest will follow.
I recently withdrew from GCU for multiple reasons which I will state below. I was so stressed out and just could not take dealing with them anymore. Before I withdrew I had a conversation with my finance counselor on exactly how it would work and what would happen. I waited until I was finished with classes and then decided to withdraw and not register for the next semester. At first my finance counselor said I might own for the classes that I failed and that I would have 180 days to pay the balance. I told him I would not be able to afford that and asked why I would have to pay for classes I failed. I explained that I failed a class at a different university and did not have to pay for it.
He then sent me an e-mail saying he was really sorry for causing any stress or confusion, and that he talked to his manager and  discovered that I was covered by financial aid so I would not owe GCU anything out of pocket after all and that my balance with GCU was $0.
I forwarded that on to my enrollment counselor and academic adviser and said that on the premises of not owing GCU anything, I wanted to proceed with my withdraw from classes.
Today I got a call from finance (a month after my withdraw was processed) saying that I owed over $5000 for the classes that I did not pass.
How can this be? I have a letter from my finance counselor saying that I would not owe anything out of pocket, even for failing classes!
For being a private "Christian" university, you would think they would honor what their EMPLOYEE said and clear my balance as it was agreed upon before I withdrew!

As far as the other problems go: I started attending GCU about 2 years ago when I was going into my 3rd year of college. I came from a campus university and was fully expecting very difficult classes as I was starting 300 and 400 level classes. Well, the 400 level classes were a joke! I really think classes are written at a junior high level, and assignments are a joke also. I never had a professor that was involved in class, the most they ever did was copy and past some info from the internet and ask our opinion about it. I don't think I learned a thing over the lsat 2 years besides to never take online classes again.
So you are probably wondering how I failed? Well, since I started GCU I never received a refund check on time and the last check came during the 7th week of an 8 week class. We did not have the money to pay hundreds of dollars for textbooks. My professors agreed to let me turn in the first few weeks of assignments late, but 7 weeks of assignments was not going to fly!
And the last class I failed was because we were moving cross country and our grandfather passed away and I asked the professor if they would take my work late. They said yes and they completely understood, I was thrilled! Then a week before classes ended I told my professor I was going to start turning in all of my late work, that we were finally settled, and she said she would no longer accept late work because it was not fair to the other students - so I had no choice but to fail.

All in all, those little things do not compare to having to pay thousands of dollars that I was told I would not have to pay. This could ruin our credit and our future and is just completely ridiculous to put someone though. I'm hurt that a "Christian" would do such a thing to someone.