loan axis app fraud scam

I requested a loan amount of 2000 from loan axis but received only 1200 and i did not sign or see any loan agreement and they did not tell me why I get 1200 only and they directly send it into my bank account . I check app and find that i have to pay within 6 days . They have my phones contact numbers and telling me to pay in full now and harnessing me . I did not gave my all contact number to them . I have reported the number