Customer service complaint

Purchased a Lenovo Think centre PC All in one from Takealot 15 Aug 2017. I connected the PC to confirm it worked which it did. The problem comes in weerks later when I tried to switch on the PC it was password protected and i had not setup a password yet as I had not used it yet. Hence I emailed Takealot 18 Oct to ask how they could they assist me. The response was that I would have to contact Lenovo myself. I then returned the PC to Takealot as it is under guarantee. There response was unacceptable to me. The PC is with Takealot and they have responded up to today that they don't have the password either therefore they trying to deliver it back to me without being resolved. I have refused to accept delivery of the PC. Had I bought the PC from any other retailer i would have returned the item to them to have the supplier rectify the matter and get it back. Takealot has not even made an attempt to send the PC to Lenovo to have it fixed, by that I mean reset the PC to factory settings as it did not allow me to do that. Surely it doesn't take a genius to come to such a conclusion. It's been over a month that Takealot's has messed me around, i continually have to phone them only to speak to an entirely different individual and they don't have a manager in charge to whom they can escalate my complaint to. Marvin Waverley has been my last contact person Friday 17 Nov 2017.