Arthi Construction - Home construction not yet finished

On Nov-**** we entered into a contract with Arthi building construction. The duration was * months to finished all the work. But they not yet finished work. We inform them * months before we need to do a house warming ceremony on Oct-****.
They agree to finish the work before one week and took the amount also. After that, they won't finish work. So far they not yet completed.
Now a day we are calling means to block our mobile number.

Please find the below engineer details:
Arthi Construction, No. **, Thudiyalur, Coimbatore - ******
Landmark: NEAR Muthu Nagar Bus Stop
(Girinath +** **********, Ramesh +** **********).