No customer service at all!!!

Please help I have reported before vodacom has my phone now for 7 months j7 pro with manufacturers fault they refuse to replace this phone and I am paying my contract every month now I sit without a phone and they dont do anything just send me quotes to pay for it its a manufacturers fault alot of vodacom consultant has confirmed J7 pro has a manufacturers fault but still they refuse to repair or replace my phone I have been a customer of them for over 15 years first time this happens and the dont admit it please help