After spending ~100k, our ads randomly stopped working last month without changing anything. Support took 10 days to reply saying the account was up for a review (no notifications sent, no indicators). Yet, it still wasn't working.
Booked a consultation with one of their so-called "Experts", he couldn't find anything wrong and suggested to contact support again.
After the initial 10 days response, still waiting for a reply from so-called support 20 days later. I'd assume support only exists for companies that spend millions a year.