being scammed by tradegains.net

I invested R2100 to get profits of R13200 in two days time when i have to withdraw my profits they required me to pay R3968.08 for international monetary exchange fee i did still they kept asking more R3155.06 for bilateral transfer server for my profits to reflect on my bank account i did pay until now they want me to pay about money which is R3748.96 that i haven't paid.Please help me