HDFC Bank — Fastag recharge

I have a fastag for my vehicle issued by hdfc bank. I need to recharge my fastag but I have made several attempts and put all methods into place e.g payzipp, my fastag app, hdfc recharge portal etc but nothing works . Even my vehicle no is not matching with my fastag, since my mobile no is registered and I can see my fastag balance on giving a missed call on a particular no. But when I use same no on hdfc portal it shows no is not registered.
Very disappointing and disgusting on part of hdfc service