poo

am not happy with this service not one bit, i have no joy with service at all, i changed over to the unlimited plan,thinking maybe the plan i am on (R300-6GIG) is why am not getting any good reception. i have no service,even with the unlimited plan, ive tried every part of my house , if i do manage to connect it for an hour and i can only connect one unit to this sim, ive tried routers , phones , modems , there is no luck, i haven't received a call after numerous request for a call or assistance ,