Invest solar Norwood bad products and services

Invest solar Norwood. Bought two solar sets 24v with batteries both sets were working fine for 5 months. Hence the poor service received initially. The batteries started lasting less and less I went to see them. They said i should bring the batteries back for testing. I asked for them to send out a technician this took 2 weeks .started this process on the 5 jan 2022 to date no resolution. I bought new batteries for the two solar sets that set me back around R19 k then returned all the batteries to invest solar for a refund as they kept avoiding me. Shawn the owner or manager has no people empathy he let his staff call me to collect my batteries in april 2022 saying there was nothing wrong with the batteries although the new ones i bought are working and lasting longer than their ones ever did put his batteries back in the system and two hours later my system switched off the batteries are the problem and they will not refund me. bad service bad attitude from all at invest solar. Warning to everyone this company is a useless supplier and terrible customer service. Extremely disappointed