HDFC Bank — hdfc fastag not received- unable to reach helpline number

Address:

No. 3, First Floor, Rajan Nagar 3rd Street, Injambakkam, Chennai, Tamil Nadu, 600115

I had applied for HDFC FasTAG on 3rd December. I paid Rs. 500.
On 6th December, Recieved a message saying "FASTag has been issued successfully". Received customer ID 19xxxxxxx367 and Wallet ID 19xxxxxxxxx142.
On 7th december, received a message saying "FasTag has been successfully recharged for Rs. 300". Received reference number 300xxxxxxxxxxx407.

I STILL HAVEN'T RECEIVED THE FASTAG.
UNABLE TO REACH CUSTOMER CARE [protected]. it is NEVER REACHABLE.