National Highways Authority Of India [NHAI] — illegal blacklist of fastag by hdfc

I had purchased a fasttag from hdfc bank and it attained negative balance of 40 rupees on 22nd july beacuse the recharge website was not working. I recharged my fastag with 1000 rupees on 28th of july and called the customer service of hdfc fastag to remove my fastag from the blacklist and i was promised that within 48 hours it will be done but nothing was done to remove it from the blacklist.
I have been calling hdfc fastag several times and every time i have been told that it will take 2-3 days but i keep getting stuck at the toll plaza for no fault of mine and the hdfc fastag is illegally keeping me on blacklist and everytime i call the customer care representative keeps delaying saying that it will take 2 to 3 days.
Please take stringent action regardind such reckless behaviour and undue harrassment from the service provider who even after 15 days is blocking my fastag for no reason.
Such behaviour of these companies makes using good government initiatives a hellish experience for consumers and will definitely dissuade people like me from trying any new schemes or initiatives of the government.
It is my humble request that please take stringent action against such companies so that the good name of the government of india does not get blemished by such operators whose only purpose is making profits at the expense of general public and the government without providing any quality of service