650-334-1898

who is it ?

Its came up as FACEBOOK and they asked to speak with my marketing department

That is the same thing she said to me. She said it would be no charge for 90 days of free help, You can not even call Facebook if you have a problem less them calling to help you with free marketing.

They kept calling me at work…3 to 5x in a row. But when I called this number back, it said it didn’t take incoming calls. The message said they were from fb advertising.?

Sounded like a Meta team pro adviser
(My caller ID even said "Facebook Ads")

They knew my name, phone number, and Meta account name. Asked if I needed any support or help improving the ads account.
(this all sounded legit)

When they asked me to confirm my email, I started getting suspicious
(they should already have this info)

I asked what they had on file
That's when they started to back track

By this time, I knew it was a scam and I shut them down

The important take-away here:
Platforms like Meta and Google are targets for scams like this where malicious companies triangulate a phone number based on social media and other details, then attempt to capture more info (including ad account info, etc). It's important to never give any info over the phone and always beware anytime a cold call comes in from any 'service provider'.