Lost Luggage on Delta Airlines Flight Without Compensation, Requesting Help

I am very disappointed with this airline. Not only did they lose my suitcase containing important items, but they also showed no interest in solving the problem. I have been trying to contact them for three weeks, yet I have received no support. The least they should do is compensate me for everything I lost. I was carrying cameras, chargers, and many pieces of equipment that I use for my work, and it is unacceptable for them to simply ignore the situation. The loss is significant. I demand to be compensated accordingly, as this mistake is unacceptable. Delta Air Lines must compensate me, so I expect a solution.