New TV Box Frozen on Welcome Screen Day 2

New customer here, installed equipment the following day after some technical issues with the plan set up. The TV box in our living room gets stuck on the Welcome Page, requiring us to restart the modem. This isn’t the ideal experience when wanting to watch TV. How can I request a box replacement?

Living Room Day 1 (set up)

Got as far as pairing remote > blank screen > Restarted device by unplugging > frozen on welcome screen > Replaced splitter > Did a restart via Xfinity Assistant > Welcome screen, connecting to Internet, blank screen then it worked

Living Room Day 2

Turn on TV, showed loading welcome page and froze > Unplugged device and plugged it to a new outlet > loading welcome screen then froze

Using new HDMI cord that it came with, the new TV box in the kitchen works perfectly fine. Had no issue during set up or on day 2.