Open Box PowerSpec G464 does not have Ryzen 3900X processor or 32GB memory

To Whom it may concern:
I purchased an open box PowerSpec G464 desktop PC from the Microcenter in Paterson NJ last week.  Although the G464 is advertised as having an AMD Ryzen 9 3900X 3.8Ghz 12 core processor, and 32 GB DDR4 RAM, my PowerSpec actually has a Ryzen 3700X 3.6 Ghz 8 core processor, and 16 GB DDR4 (2 8GB G Skill sticks).  There were no open box disclaimers, and all relevant materials (the receipts, the 'open box' sticker on the PC) indicate that a 3900X 3.8 Ghz 12 core CPU and 32 GB DDR4-3200 RAM should have been included.

Can I take it back to Microcenter to have the right processor (3900X 12 core 3.8 Ghz) and memory (32 GB DDR4-3200) installed into the PC, as it was advertised?  Do I have to take it back to the same Microcenter?  (I'd prefer to take it back to the Microcenter in Brooklyn NY, which is much more convenient for me).

Thanks