NO SERVICE! URGENTLY NEED HELP!!!

I URGENTLY need to get hold of momentum. I call, hold forever and once they (if they do) answer, transfer me, rings and ring, then I get cut off, every single time! I have sent them countless emails which they completely ignore after the initial automated response. Momentum, you area total waste of time and I am fed up, spending DAYS trying to get through to you! We pay a fortune, for what???