Worst service from Sergen Solar

Very bad service at Sergen Solar, when I took Pylontech batteries back for warranty. No communication, when I requested the log files after testing, it looks like I asked for the impossible. It looks like very *********** people can't understand that I ask them to email it again(I didn't receive it), then they threaten me to collect the faulty batteries that are still under dispute to be destroyed if I don't collect them. They just wanted to get rid of all the evidence. Their after-sales service does not exist at all. They think they can hide because the end user is only working with the installers and doesn't know them