Help Please. I've been hacked

I received a notification that I had several plug in updates, one being a S2 plug in, as usual, I selected all and clicked update. After the plug ins updated I noticed A need to update S2 framework, I believe. I had my log in and password for S2 member already there so I chose to update through the plug in console.
After doing so I received a error warning me that something did not configure correctly. When I checked the site, I saw that the Entire top of my site says a bunch of Viagra…Cialis…. over and over.
What do I do to get rid of this.
I saw a similar post from several months ago that said the hacker changed the passwords.. I am currently still logged in. Please advise asap.

Hello William,

I’m sorry to hear that you’ve been hacked.

Although, if you got a notification to upgrade s2Member, and then after that you get another notification to upgrade the s2Member framework, that’s certainly strange behavior. (The plugin update notification is only available for the framework, the next notification is for the pro version, usually.)

The best advice I can offer in this regard is to roll back the server/website to a previous state before the hack, and immediately change your password to a more secure password.

– Eduan