Large Taka — They ask about double double payment of my sanction and giving me threat to publish my photo and contact my all phone calling list

They give me sanction amout 3000 and disbursed 1800 only my account and when i tired to repayment i didn't work and repayment amout is double like 68990 etc and they give me threat to publish my photo and contact my all contact list etc. I want to repay but how