Xrbia — Promised EMIs not credited

I have flat in xrbia chakan phase 2 in C3. While booking, they promised 24 emis will be credited.I have proper and official email communication from them as well ! Intitialy, after three emis they stopped crediting. After rigorous follow up they adjusted some amount in balance payment but still emi amount is pending from their side. No proper response from xrbia team neither they reply properly on the email. please tell me where i will get solution regarding this.Very disspointed with the after sales service of the xrbia. please support me regarding the payment.