Downloading csi file for TDS return

Dear Professionals, 

My client files tds quaterly. For first 2 months he paid TDS through NSDL and 3rd month TDS was paid via TIN 2.0 as all the banks were migrated there. Now when for filing TDS return when i try to download .csi file 2 months csi file i get it in OLTAS, however the 3rd months csi i can download from E-filing portal. 

How to generate .fvu file with two csi files? or is there any other way i can generate and file tds return? 

thanks in advance