eFax
1
This is the worst company ever.
Upon opening the account, the billing department put a temporary hold on using the eFax number because they could not verify some part of my credit card information (they wouldn't tell me what that was). I tried to cancel the account through toll-free customer service. They directed me back to billing. Billing sent me to the online chat function to cancel. And the online chat representative sent me back to customer service. The upshot: No one will cancel the account.
My advice: Stay way clear of this company.