Gosolr - Can they redeem themselves?

We started our application process on 8 December 2022. After much painful toing and froing, we finally signed our contract in January. The 5th, to be exact. The payment followed a day or two later. Ultimately, on 11 January, the contracted installer (Non-Stop Solar) informed us our installation date would be 14 February. During this waiting period, I told Non-Stop Solar about my estate compliance requirements and requested a site inspection. I called the installer on the day of the agreed installation date. He informed me they ran out of solar panels and would need to move my installation to 28 February. The exchange that followed was not pleasant. As before, they are not responding to my reminder calls or emails. They have yet to contact me for a site inspection date or contact the estate to ensure compliance. Tomorrow will be four days before the second D date. Will they redeem themselves? At this stage, I have zero confidence. I will have no choice but to look for an alternative if they don't deliver.