Tmobile home internet is horrible

My home internet is very bad no matter how many times i reset, restart , reboot, unplug then lug back in the internet is horrid.Worst internet ive ever seen.Ive called them to complain many times, and no matter what its still bad, my wifi cannot be fixed they've sent 3 replacement each of them are dog i get .5 download speed during the afternoon.Cant even watch youtube without what im watching buffering.Can play no games without my ping being atleast 100-300. Can barely do anything i might aswell get the worst internet because ill atleast get 50 ping all the time. Horrible internet dont buy