lost t-mobile signal, how do you get help?

Speed varies  from 5-10 mbps to 40+ at other times freezes in middle of a zoom presentation, or shows no signal -  I’ve done the restart and sw refresh and same pattern. Thirty minutes into a support call back from the above number I was (unannounced) transferred to an order queue and no answer after another 20 minutes 

can I expect anything better?