Company not giving salary increment

I am working with a IT company from last two years. My salary is 47000 per month. At the time of joining company has given me assurance that every year company will give increment. It is also mentioned in companies policy that employees may get increment on the basis of performance. On Nov 2015 I got the increment and it was mentioned on the appraisal letter that your next increment due day is Nov 2016, but did not received the same. I sent a reminder mail two months ago to the HR but no response. Rest of my team members got the increment who are at same position and same experienced like as me. Now what kind of action should I take.