They mailed like below:
Dear Customer,
We refer to your e-mail regarding ICICI Bank FASTag.
With reference to your e-mail, For Fastag related queries we have a specialised team and you may contact the Fastag 24*7 customer care @ Toll Free Number:1800 2100 104
(Chargeable Number:1860 2670 104).
Also you may login to FASTag account and raise the concern on the right hand side helpdesk option.
For more details click here :
Sincerely,
Sonali Prasad
Customer Service Manager
Team ICICI Bank