HDFC Bank — Not received fastag after 15 days

I have applied for hdfc bank fastag on 04/11/2020 and remitted rs.500/- by online payment. I have recived an email message stating that your fastag has been issued sucessfully. My customer id is[protected]. Till date i have not received the fastag. I am a customer of hdfc bank for the past 3 years. I am unable to contact them by email nor toll free no. Since both are faulty. Such a poor service from hdfc bank never expected.