THREAT THROUGH LOAN APP

I logged in to see how much they could lend me on the Le Credi app, they offered very little and on top of that, to be paid in a week. I didn't accept, but they deposited the money anyway. I had to pay to avoid harassment. Now they are threatening me to pay more than 1000 soles or else they will harm my family members. They don't call anymore but they have sent me the threat in writing.