What to do if my professor won't give me a grade for a test? So I took this online class and the professor didn't grade our exams till the end of the semester and I was surprised to learn that I got a 0 on the first one. Now I remember taking this test and while I may not have gotten a perfect score, I don't think I did bad enough to deserve that grade. So I talked to him about it and he said he has a couple of blank scantrons and can't figure out which is which so he gave a couple of us a 0 instead. The thing is, the testing center at my college won't let you turn in a test unless everything has been filled out and I'm 100% sure that I didn't knowingly take the test without putting my name on it.

What do you think I should do? He also mentioned in the middle of the semester about losing his laptop or something like that, do you think he's lying about the blank scantrons to cover up the fact that he may have lost them and won't take responsibility for it? I was talking to him through email yesterday and now he won't respond. It really hurt my grade and he won't do anything about it. I NEED HELP!
In my assessment, the professor acted somewhat negligently here. (Albeit maybe not lying). 

I find it odd that he claims that he had a few blank scantrons without names, so he just gave people 0 points on the test. Really? He doesn't even have the presence of mind to email students and ask if there had been a mistake? This seems incredibly lazy. (Not to mention the fact that he waited until the end of the semester to grade the tests). I'm not sure it would be too far beyond the call of duty for him to have at least email students to verify if what he is seeing is correct. I would have done this for students I have, especially if they were turning in the homework and completing other assignments. 

I do wonder how in the world your testing center would return blank scantrons to a professor. At every school I have ever taught at or attended, the testing center produced scantrons with student names computer printed on the top. And the testing center always scored the scantrons. Does this professor have his own scantron reader? 

Moreover, every testing center I have ever interfaced with kept records. Surely your university keeps digital records of which students have taken the test, right? I'm pretty sure my undergrad institution kept computer-based testing center records even in 1996. 

As Buffy says, I would stay away from accusing the professor of being a liar. But make this professor account for testing records recorded by the testing center. I'm of the opinion that this is actually part of his job description (implicit or otherwise).