Assignments are Failing Me

I had 3 assignments today like always, however each of them was about base assult. Do it with smgs, do it with pistols, and do it on a medium base. I destroyed 3 bases today. One with pistols, easy, got the mission. One with smgs, hard, got the mission. Another that was medium, medium, did not get mission completed. This is quite upsetting since i wanted to get the tank rewards package this week and git jipped on the first day. I did a lot of grinding for some hours but never got another base spawn. Anything I can do to make up the mission points im missing?