Correction in e-challan not done by ao

Hi Experts,

While filing my self assessed tax for AY - 2012-13 , in the e-challan the AY by mistake came as 2011-12.

Pertaining to this i have had already submitted a written application to my circle AO in September 2012 as per the proposed format in the TIN website and i also got an acknowledgement copy of the same.

Till date i don't see changes in the tax credit statement ( 26AS ) for AY-2012-13 , and the amount paid by me as said above is still reflecting in AY 2011-12.

Please advice me how to proceed futher with this.

Thanks in advance.

Deb.