“New” / Demo Solar battiers

I have ordered a 6kw lithium ion battery at their discounted 50% sale. When i received the battery it looked second hand and definitely not like the one in the picture. It was fast to receive an invoice for the battery and delivery was fast. I did contact them and they said its demo stock ( not stating anywhere on the website that is what you are getting). Also the bms is not working. Again i contacted them and the person just responded per whatsapp “sorry” i have tried to phone and no one answers. They dis msg back will phone you back just in a meeting! They trade under different names. Like the watt store, thewattstorsa and green sky energy! I am not happy with the service and the product i have recieved! I don’t know if this battery will even let long!