Your emloyer has until January 31, to mail it to you, not get it to you.
The IRS advises that if you have not received it by February 15th, and you have verified with the employer that they have your correct address, that you should contact the IRS.
The IRS will then contact the employer and assist in getting a copy of the W-2. The IRS may adivce you to file using an subsitute form.
The employer may be fined. I believe it is a 75.00 fine, but I am not sure of the exact amount. IN most cases, however, a fine is not incurred as long as they respond to the IRS inquiry.
Regardless, you have an obligation to file by the filing deadline (April 17th) in your case.