RamboRobinson27

I was playing Halo 4 on Live and was completing the Spray and Pray challenge of 150 kills with an automatic rifle and the reward was 20,000 experience upon completion. I haven't received the experience points but it say that I have completed the challenge. Has anyone else had this problem? I have contacted XBOX LIVE support and they gave me this link thinking I would get better results from a post. I was at the end of completing level 89 and was only shy 1,000 experience from leveling up and I had 2 kills left to complete the Spray and Pray challenge. Nothing has been accredited and I have restarted my XBOX with no luck. Hopefully, I can get some answers. Thanks for the help in advance!