Complaint Review: Loan me

 Hello, I took on a loan with loan me 13 month ago of 2600$ an installment loan and after a year thy are telling me I have to pay off 4 years 435 each coz I have a interest rate of 199%. I had taken the same loan amount with cash call and was done with my payments afer a year with the same payment amount. I am honest when I took on the the loan I didn't know much about loans I am from Germany and just needed the money to help out my parents.

I paid loan me back already double the amount I borrowed and they want me basically to pay back 20k to pay off 2600 dollars I borrowed I feel screwed over and taken advantage of. I ask around and everyone says that that isn't right what they are doing and even my boss told me I should sue them and not pay more back. I want to sue with a class action law suit and would like you guys to contact me if you are willing to sue with me. Since I already paid them back what j borrowed and even double the amount they can't say I didn't pay so I want them to close my account I think they scam and no body has yet done much about it. Pls email me lorrainegilles90@*****.com as soon as possible. Thanks