Sony Vegas Movie Studio 17

When installing the product it asked for an e-mail address. I added my hotmail e-mail address. It then demanded afterwards that I register the product and create a password, so I used the same e-mail address only for it to tell me that this e-mail address was already being used. I tried to recover the password (that I never created in the first place) and I received no e-mail so I had no choice but to use a different e-mail address (my gmail one) to then create a password and register the product. Now the program won't work because it says the product code is registered with a 'different e-mail address'.

I am unclear if the issue was caused by this or whether the disk I got from amazon has a copied product code and that I've been scammed.