How long a GST officer takes to issue Aknowledgement (GST RFD 02) for GST refund

Kartik (Self Employed) (75 Points)

21 October 2020  

How many days after filling for GST refund. acknowledgement or deficiency memo is issued?

How long should i wait before filing for "Deficiency Memo/Acknowledgement not received" issue under "Intimation on account of Refund not received"