We have been waiting now for 4 months. The system ...

We have been waiting now for 4 months. The system is installed, been approved by everyone but still waiting for a cell kit part. They have given me no timeline on when this is to arrive. I don't understand why they cant either change something out so it will work or give me a more definite timeline. We are very frustrated. It has already been over 100 here and we would like it to start generating. Very disappointing!