Business ProfileforCheetah Solar

I signed contract with Cheetah Solar in 2022 and after many hiccups with their installer Titan Solar, system started working in September 2022. In beginning of June 2024, I started receiving emails from SolarEdge that something is not working correctly. I called Cheetah Solar support number on June7. Their representative called me and inform that Titan Solar will contact me. On June 11 I received email from Titan Solar stating that everything is working and they inquired for screen shots. I tried to call Titan Solar and explain situation. I was transferred to voice mail of *****************************. I left message and also replied on email. Unfortunately my email returned as undeliverable. I tried 3 more times with same result. Then I called Titan Solar and now their number is not in use anymore. I called again Cheetah Solar and left 3 times message but no response received. I paid total around ******** $ for solar system and now it is not producing even a half of expected energy which shows on SolarEdge monitoring application. I also monitor daily cost of energy on APS application and every day my cost and expected payment to APS is increasing although we are currently on vacation out of State. I really do not know what to do, who to call for diagnostics and repair based on warranty tegulation.