Segen disaster

I bought an inverter & 4 batteries middle March '22. today 19 May, I still dont have a working system. 1st I had to send in the batteries for testing, then I had to collect it again after testing, then I had to send in the inverter ( 3 May '22). Since them, I have batteries & no inverter. I have sent 30+ emails - falls on deaf ears. I called many-many times, either rings on the extension or goes to VM. Not a single person takes responsibility or reply. e.g. Get an email saying, the product manager is now looking into it, we will test ... 3 weeks later, not one call get taken or one email rep**** to, inquiring about the testing. On 6 May Lubabalo says "Product management is currently testing 4 batteries with your inverter", today, 19 May he says "Due to vigorious testing, batteries should be ready Tuesday next week" i.e. 24 May. My batteries was there for 2 weeks to test (and returned ), what batteries are they testing now ?