Taking a loan

Pls watch out for this app rapid finance i app**** for a loan and they said i approve for R260 but only gave me R182 and i called the lady said it my first time using the app they only give small amount and you have 7 days to pay otherwise R13 will be added to the loan everyday she explained to me everything wich i understand and i didnt have any problem but now today they decide i have to pay now i have 1 day left till Tuesday but now i have to pay on a monday and now they are threatening me but i dont care i can only pay on the 25 i will pay that little overdue amount and thats it but dont use them very horrible