CAN'T LOG INTO MY E-MAIL ACCOUNT

I am constantly getting error messages, such as, invalid credentials. I need to be able to log into my e-mail account right now. How do you expect me to run a business when your Web site is not responding. Why can't I log into my e-mails account. Every day same error message. No one available to talk to after hours. No chat room, no customer support, just this community chat which I will probably won't get a response in couple of days. I need help. I need some one to pick up the phone and call me and help me now.