Home Internet slow speed anyway to force b12?

Alarmguy.. try to renegotiate a deal with spectrum. Fresh out of the box grey nok 5g21  my top speed is 10mbps on the down and 28mbps on the up. My average is <1mbps on the down.  11/29/21 customer service when I called acted like my call was the first of this nature ever.   2 hour wait time for a call. This thing is going back to t mobile and honestly because the service guy apparently lied to me acting like I was the only one who had this problem I think my family plan and tablet are moving to another service.   What really gets me is all my devices on a t mobile sim card are pulling 30+ mbps from this location I can't believe t mobile wants or expects users to pay 50 a month for speeds slower than dial-up  the correct way they should handle this @ point of sale, "some users have issues of limited speeds if you encounter this issue there will be a return shipping label in the package. Please return the device and do not cancel current ISP untill you are sure this is right for you."