Extremely poor service

Hi my phone broke so I urgently needed a new phone so I when to vodacom trade route mall I got a Samsung j4. The consultant said my phone will be ok after 4 hours. I tried it and it said sim not registered. I left it today tried to try it again it still said the same thing. After 10 times calling vodacom customer care I eventually spoke to a consultant who advised they had given me the incorrect sim card that is the reason it does not work. I need my phone for work now they tell me I need to go to vodacom store where I took out my contact that's really not good as I am loosing money. The service is really poor.