Hi,
You can request the 2nd shot voucher here yourself:
http://www.microsoft.com/learning/en-us/second-shot.aspx
The answerers on this forum cannot provide the voucher for you.
Note that 2nd shot is available until 31 May 2014, after that date there is no guarantee that Microsoft will extend the data for 2nd shot.
Good luck with exam 70-515!
When you see answers and helpful posts, please click Vote As Helpful, Propose As Answer, and/or Mark As Answer
Danny van Dam
MVP, MCC, MCT
Twitter: @dnyvandam
http://www.dannyvandam.net