Nexa — original rc not received and fastag provided with car is not registered with the bank

Address: New Delhi, Delhi, 110012

We had purchased baleno delta from rajouri garden, new delhi branch on 28th may 2018. But we have not still receive original rc nor they giving any details about despatch. Also fastag provided with the car purchase is not working and when contacted with the concerned bank, they told it has not been registered at all.
Customer service is very poor with nexa.