I bought a Dell laptop charger online, when I recieved my ordered item, I've discovered it's a counterfeit, not what they've advertised on their website/app

I bought a Dell laptop charger online, when I recieved my ordered item, I've discovered it's a counterfeit, not what they've advertised on their website/app. I'm very disappointed with their service. An original Dell laptop charger won't be the same price with a counterfeit.