x14 R1, how can I file a complaint or take action

Hi, I purchased a brand new Alienware x14" laptop on Nov 28, 2022 from Best Buy. I noticed the Wi-Fi was losing signal and I contacted Dell customer service in Mid Dec, they suggested it could be due to my router or outdated driver and all the basic trouble-shooting stuff. I day-trade and this manufacturing defect has lead to financial loss since I was not able to place any orders due to defective wireless card or motherboard and it has caused me extreme anxiety and stress.

I submitted a ticket, after going through endless trouble-shooting steps, the customer service arranged a technician to replace the Wi-Fi card on my brand new laptop, but the problem still persists. I have requested to exchange my laptop as I don't want a refurbished. Although I contacted them 2 weeks after the purchase of this brand new laptop, now they refuse to send me a replacement, but instead they are offering to change the motherboard. This is extremely annoying unprofessional and disappointing and I don't want a refurbished laptop for which I paid the full amount. 

Can anyone please guide me on filing a complaint with the corporate office. Where should I start?

Thanks and much appreciated.

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