HDFC Bank Bank Fastag — fastag not activated

Address:

Bangalore Urban, Karnataka, 560064

My fast tag[protected] is not yet activated or not working. I have charged rs.1000/- prior to going for interstate travel. At all the toll it was showing blocked or black listed. It was insane on part of the company or agency putting customer with lot of inconvenience.
Several time i called their toll free number for several days no body answering this is despite waiting long time on phone.