#nigeria-scam

Deposited with 'Earn Forex Nigeria' for huge returns, now they're asking for 'Naira conversion fees' to withdraw. Scam?

Hi everyone, I'm feeling really stupid right now. About six months ago, I saw an ad for 'Earn Forex Nigeria' promising like, crazy high daily returns, saying they trade forex for you. I was looking for a way to grow some savings during the cost of living crisis, and their website looked kinda legitimate, with testimonials and everything. I started with a small amount, then put in more, in total about 4,000 EUR, which is a lot for me. I saw the profits piling up in my account dashboard, it looked great. Now, trying to withdraw, it's a nightmare. They keep telling me I need to pay a 'Naira conversion fee' because my deposit was in EUR and their payouts are in Naira, and then a 'security verification fee'. Each time I pay one, another fee pops up. Is this a common scam? I'm so worried I've lost everything. I'm based in Rotterdam, so I only ever interacted with them online. What steps should I take next? Any advice would be appreciated, just feeling really lost.