Re:

I'm sure you deserve a higher salary.
You are a real professional in your field, all you need is a diploma to confirm your skills.
Just make a single call:
Inside the USA: 1 - 8 4 5 - 709 - 8 0 4 4 - 2
Outside the USA: + 1 - 8 4 5 - 7 09 - 8 0 4 4
Call them leaving your first and last name along with your telephone number on their voicemail and they will contact you very soon.
Hope you will use this information.