Unable to withdraw

My mother has invested more than 1 million principal and earned more than 1 million yuan on the Jinlifeng platform for foreign exchange. When we wanted to withdraw, it told us that we had to recharge Vip of 300,000 to withdraw. We borrowed money and paid it. After 300,000 recharged Vip, I remitted it many times, and then it asked me to pay more than 160,000 taxes. Is it a scam? I have been asked to pay, but I can't withdraw it. Will the big platforms deceive people's hard-earned money?