You can send email/letter to your employer with Copy to MD,HR-Head, if you have not received the form 16, and ask to supply it by redg/speed post, and mention that if desired you can supply postage prepaid self addressed envelope. Your communication(s) shall be proof that you have informed/reminded.
If you do not receive, you can complain, under acknowledgment, to o/o jurisdiction IT commissioner where the company files returns. You can get the address of this office from any office by giving PAN/TAN number of company. Heavy penalties are imposed on company. Company may claim that they have sent, but how shall they provide POD. Moreover you have already offered to supply envelope. If you do not hear fro IT office you can raise RTI.
Such an action shall deter the concerned employee who issues the form 16, to not to sit on form 16 in his present and future ventures. Thus you shall be helping self and many fellow colleagues.
Even if you claim TDS, if company has deposited the tax, you shall not get refund.