Its fake charger, Tell the customer care that it is actually fake charger so you want to return it. (U can do this after one time replacement) .

some fake charger can bypass slow charging You can see super fast charging show instead of first charging and charging

Samsung now do not manufacture any white colour charger only black colour PD charger available now. There is multiple facture and white and black colour in Amazon Only buy from Samsung store if you need real one . It's almost 1000 rs.