No Internet, No Customer Services, Just debit orders!

Used to be great and from nowhere there was just no internet anymore."Sim Registration failed contact carrier". I reported and they called and told me somebody would contact me to come set it up right. Still waiting. Im paying every month for this useless thing. Got me losing income because of this. I tried to cancel yesterday, but today my account is still on and nobody's coming to disconnect. I bet they are going to take money from my account even though I didnt use their internet. Wow Rain.