Compounding of cost audit report filing

We have received a Show Cause Notice from ROC under Section 233B(7) of the Companies Act, 1956 regarding filing of Cost Audit Report with Central Government for the financial year ended on 31.03.2012, 31.03.2013, 31.03.2014 and 31.03.2015. Below are relevant facts. For Financial Year 2011 – 2012 (31.03.2012) Form 23C – Intimation of Appointment of Cost Auditor ----- Filed Form 23D – Intimation by Cost Auditor to Central Government ----- Not Filed I-XBRL – Filing of Cost Audit Report with Central Government ----- Filed For Financial Year 2012 – 2013 (31.03.2013) Form 23C – Intimation of Appointment of Cost Auditor ----- Not Filed Form 23D – Intimation by Cost Auditor to Central Government ----- Filed I-XBRL – Filing of Cost Audit Report with Central Government ----- Not Filed For Financial Year 2013 – 2014 (31.03.2014) Form 23C – Intimation of Appointment of Cost Auditor ----- Filed Form 23D – Intimation by Cost Auditor to Central Government ----- Filed I-XBRL – Filing of Cost Audit Report with Central Government ----- Not Filed For Financial Year 2014 – 2015 (31.03.2015) Form CAR – 2 – Intimation of Appointment of Cost Auditor ----- Not Filed Form CAR – 4 – Filing of Cost Audit Report with Central Government ----- Not Filed Now what should I do in this case. How should I proceed for compounding the offence or if I get the Report from Cost Auditor in back date then is it possible to pray the ROC for allowing us to file this Report as it was inadvertently left out at cost. Kindly guide with procedure and legality. Thanks