Hello, I took Physics 101 the Fall semester of 2016. I bought the textbook new with an unused registration code from my university bookstore. I was able to use Wiley for homeowner that semester. I am now taking the second part of the class with the same textbook. However, when I put in my registration code, it says the code has already been used. I was told that I only had to buy one code for the class, since we are using the same textbook. Is there any way I can fix this issue?