Some informemation about gst

Actually there can be any problem like, anything has been mismathe in information. Do u got any letter or mail in that regard, check for that.

Or go on website of delhi vat, in that go into know your tin option put necessary information like, PAN or firm name, u may come to know whether it's alloted or not. May be sometimes, department send certificate late.
If even doesn't happen this way, go into department look into the matter or give some bribe, if u need it fast.