Bad product - shocking service - Abusive sales rep and owner

Bad product - shocking service - Abusive sales rep and owner. The invertor stopped working while under warranty. It was sent for repairs twice. After three months I requested a refund. The owner of GenTech refused. Took zero responsibility for the poor service, lack of communication and zero ownership of the fault. He then demanded that I, the customer, drive to his premise, where he will show me that I am at fault - without knowing any information. The irony was the invertor was on his premise longer than it was at my house. Thank-you Johannes and Christine from Leroy Merlin for supporting me on this matter. GenTech should be removed as a supplier. Period.