A couple of other thoughts aiii,
First, remember the forum in which you are seeking assistance. Engineers like detailed, specific information. A clear, concise account of your problem with all pertinent details will not only gain you credibility, but also help others to provide insight.
Is your building in a seismic region? How old is it?
If a one-time event like being hit by a vehicle or an earthquake is cause of the cracks, then I agree with epoxy injection as a solution, however if it's a water problem, settlement, etc., repair of the concrete is only part of the overall fix.