Captcha — Fake company is asking me to pay money...

I am tirumalaraju aruna,
I have applied for the job they said to sign on legal document (Online)
I did it
They submitted me a app to do the work the app is not working in my phone correctly...
It is working only in old touch mobile
I have a high version phone i can't do the work and complained about the problem... And asked that please cancel my agreement...
They said they will call
In call they said they will not cancel to cancel the agreement i need to pay 6700₹. I said it is your problem but they said to work.
You know p. M modi said not to move outside the house during the lockdown. So i don't go to internet shop also...
Now they are saying that time is over and telling to pay me 6700₹ in 12hrs and if not you need to pay 63, 700 in next 7days...

Please help me...