Lost $5k++ for a scam job

I met a female from Facebook and we add each other on Whatsapp.

We started off with chatting at the beginning and she started told me to help her to complete some "tasks".

At the beginning, the tasks amount is below $1k. Then, I was told to transfer a very big amount to complete all my tasks, or else I couldn’t get back the money that I transferred before. So, this time, I transferred $5k+ and complete it but it still need to transfer about $16k+ to fulfil it only can get back all the money. This time, I realised it was all a scam and $5k+ gone!