Axis Bank — fastag not delivered. why taking so much time

I registered and paid rs200 for fastag on 7th december. The wallet has been created. I was told that by 13th december, fastag will be received. But not received. Then calling upon customer, i was told that by 19th dec and not received. And again i called, 23rd december was given deadline. Again i called and was told that they have huge request, so the bank doesn't know what is the status. Its almost a month and i haven't received fastag. I have no idea what to do next. Am fed up with this bank. Banks know that they wil receive huge request, they should have been prepared for this assignment before getting contract from govt. Even the blue dart site is useless. Cannot track anything using the vrn no.