Inverter Batteries

I purchased 4 solar batteries from this supplier for R9000, and the invoice states a 12 month warrantee, ( although they said the batteries were good for 10 years plus) and 7 months later 2 of them were not working anymore. I went tho great lenghts to make sure that my equipment was not faulty,( I took my inverter in to be tested to a reputable inverter repair shop, at my expense, and they assured me, that after testing and faultfinding for 24 hours, there was nothing wrong with it. Gbs Solar threw all the books at me, stating enviromental conditions and all that crap, and I got so much use out of them, and the best they were prepared to do, was to refund me R700 for both batteries. I knew I was fighting a loosing battle, so I agreed, and furnished them with my bank details as requested. 3 Weeks later, nothing, despite my numerous e mails. I threatened them with this site and their response was, I am wasting my time, cause they export a lot of these batteries and also supply the government with them. People, watch out for these guys, PLEASE, as these batteries cost a lot of money. The fact that I am a pensioner didn't bother them at all.