Bad Quality and customer service

Goldman Furnishers customer service and quality of their furniture is not worth the money! I bought a dining room set from them 2months ago and last week we used it for the first time and found that the table felt unstable. My father decided today to see if he can tighten the *****s on the legs of the table and found that it is faulty inside. I called Goldman furnishers the lady asked me to take pictures and whatsapp to her. My father than called them and told them that it is impossible to take pics as it is inside of the legs that is faulty. I phoned them and explained what happened - the guy then tells me I have to pay R150 call out fee for them to come check it as it might be a manufacturing fault! I MUST PAY?? I told him I already paid you guys cash - you made your profit! How is it that i must pay for a manufacturing defect??