Bad treatment by regional manager at Ellies

My name is Palesa, I purchased an inverter, extension cord and 6 way multi plug at Ellies last year. The inverter and extension cord is working perfectly but the multi plug exploded after load shedding and the red switch melted. I took it up with ellies on Thursday as I didn't have my invoice anymore. The store manager understood and he checked with the cashier on the system and invoice was found. To my surprise I told them I was helped by the lady called Rebecca whom I was told she resigned. Is it my problem that none of the stuff that I purchased are not on their system? I was taken to the regional manager who told me I should take it up with the cashier who helped me . How because she didn't go home with the ellies system. He even said this Ellies is the old one. What's happening? All I wanted was the plug to be tested or exchange. Management please intervene. Clearly you hired people who doesn't care about customers but their money. It's a pity Vincent wasn't there he always help and make sure customers leave the store happy