Poor service from MTN - bought Nova 10se Dual SIM but only uses 1 SIM

@MTN South Africa I bought a Nova 10se on contract and received it on 16/02/2024 and I was unable to activate it, SIM Management option is also not appearing meaning SIM2 is not reflecting ( I bought a dual SIM for a reason). I have tried to call and have been sent pillar to post and last sent to a physical store in King Williams Town of which they were also not able to help me. So since there's no way forward and I can't even use the phone due to this. I tried to contact MTN via Facebook and they told me they don't support Dual SIM phones while they sold me 1 via contract but now they can't assist