Left withiut COC or batteries after a solar upgrade.

I asked G&S Technologies to service 2 Pylontech batteries that smelled like they are burning after they upgraded my solar system. I have been waiting 7 months, complaining regularly that I need the batteries. I also have been waiting 14 months for the COC since they upgraded my solar system. I have been told they don't have time to fetch the batteries, that they fetched the batteries and it was in another store, that I cannot fetch my own batteries, because they can't disclose their service providers. I have been told more than 20 times that the batteries will be delivered tomorrow. I have been told the COC will be emailed to me and that it is done. The COC is in a box after they moved. That the electrician who did the COC split ways with them. That the COC will be redone. They lost the count of the amount of plug pints and lights etc and I had to redo it. Very very frustrated being told there is no problem and it will be done tomorrow. Tomorrow never comes.