Nokia Modem barely working during the day

I recently received the Nokia 5 G Trash Can on Feb 24 and my services were great for a week and all of a sudden for the last week my service has been unusable during the day despite having good signal strength, not sure if it’s a firmware issue or is the company is lying to me.  I noticed N41 had disappeared as of last Friday March 4th I’m currently connected to B2 and N71 however my service is unusable from 8am to 9pm.  My current speeds are 3mb down and 30 mb up any suggestions as what to do? I’ve called customer support so much lately but every time I get a personal guarantee that my service will be restored the next day however I’m going on a week without good services and I’m very frustrated.