Condonation request to file ITR for previous years

Good day all respected members,

I am an NRI and I have not filed my tax for the past 6 years. I've recently come to know that I have TDS deposited in all these years and I would like to file my ITR for claiming the same. 

I have Sent a letter to the JO requesting condonation for filing tax of earlier years, however it's been two weeks and I have not got any response from them. 

Could somebody guide me on what is to be done and how I can successfully get the condonation request from the respective JO

Thanks and regards

Dean