GST registration revocation after 180 days

File an application to your nearest GST jurisdiction officer

File a apeal on portal

File an appeal at GST portal with very strong reason why you couldn't filed the returns in time and why your appeal may be heard .

Section 29 of the cgst .
The proper officer may either on his own motion or application filed by registered person or his legal heir ( in case of death of such person ) cancel the registration in prescribed manner and within prescribed period Section 29 of cgst act.
The following pertinent points are relevant
1. whether the business has been discontinued
2. whether there is change in the constitution of the business
3. whether the taxable person other than the persons registered under Sec 25 (3) is no longer liable to be registered under section 24 of cgst act.