Lost my website

Hi my name is Celine Atallah. I have dreamhost for my website atallahlawgroup.com. For some odd reason I cannot access the website anymore and it disappeared. Please it is urgent to contact me to fix the problem. My clients are trying to reach me and cannot due to this problem. I need someone at customer service to talk to. What should I do now???!!
I am trying to send messages to customer support and they are not going through

It looks like your domain registration expired yesterday:

and you did not use dreamhost for registration services, so to fix log into your domain registrar and pay the renewal fee.

And if you don’t remember who your domain registrar is, that’s in the WHOIS information as well: