HDFC Bank — fastag sticker not received

I have applied for hdfc fastag online with the help of the fastag service member with payment of rs 500. I have uploaded all the necessary supporting documents and rc book pdf on 23rd november 2019. My personal bank manager given me the phone no of the fastag person. After doing all the steps and payment, i have received my customer id and wallet id on 27th nov 2019 at 1:21 am and same time i have received another msg also regarding my fastag recharge. [protected] this is reference transaction number.

After 20 days i have called that person but he didn't picked my call, next day morning he picked call and told me i will check and tell you. After that he not receiving my calls.

Today, 26th dec 2019 i have him but same he not received calls so i messaged him on whtsapp and i asked him about manager no that time he told me you have call personal banker and take no. But i told him, you proccessed my fastag so you have to give number then he shared one mobile number. I called her, she received call and i told her everything then she said will check there are some issues. She given me one link to check status, i have checked there it is showing payment failed. But amount deducted from my account and in wallet it is showing a balance then how it is showing payment status failed. She also not receiving my calls now.
My personal banker also not receiving my calls right now.

The tollfree does not work, always the number busy and i'm struggling with fastag as it is mandatory.