Please help

For the first time ever I google help to do my homework because I need to get ready for my Teas test and it was to much. I did this yesterday they charge 189 for one class and they submitted one discussion board. Today they called me saying I need to pay 700 so they can buy a premium IPV because they are being track by my school and if don't pay my school will track them and I will get expelled from my school I told them I will pay them today by 6pm but I don't know what to do. Please help