"Up to" 500mb so if I switch...

I only get 6 percent of internet plan and 8  xfinity  technicians have been to my house even having me call utility company to check  incoming electrical power    Everything checks out and  xfinity says there is no more that they can do.  All the equipment has been switched out and wiring replaced.  Any suggestions?

Xfinity tech ran the test.  I also can run on xfinity app.  I have a modem, router,  xfintity  rental.  I have had 8  xfinity tech appointments.  All say that I am getting only 6 percent of my plan and my internet runs slows and affects searching.  Tech yesterday said everything has been replaced but he said that we were still only getting 6 percent of plan and internet slow.  He said that there was nothing more he could do and to call utility company to check voltage coming into our home.  Utility company came yesterday and said voltage was not the problem.  I guess I will have to cancel and choose another company for tv and internet.