No return and refund on laptops?

I was informed yesterday at Maponya mall that I'm unable to be refunded, I'm simply disappointed that there is an existing Microsoft account on the laptop I bought and it would cost me R4600 to even add my account, the person is still the administrator, I'm unable to wipe the laptop or even use it, I was informed by the cashier that the store doesn't take laptops back, which ruffles me, it's in their possession, I have to commute to and from Centurion to Soweto(Maponya mall) for something that could've been prevented, as the sales consultant said it's something simple that I could do myself.

The service sucks, the outlet has my money, laptop , copy of receipt and the charger, I just want you to retrain your staff that I am still within guarantee and warranty and that I want my money back.