Crimson achievement bug

I bought the map pack within an hour of it being released (10am UK time) and within a few hours got the mantis and man cannon achievements bar stomp. They did not add to my halo 4 G or achievement count but did add to my total G. The next day I got the turret one and it did not cause a problem, so the issue has been partially fixed. However, the initial achievements are still buggy. I cant re-get them of course but Im prepared to if it takes that. Attempts to recover my tag give error code 80070020 and I can`t even delete my profile from the xbox. Any help?