All India Institute Of Medical Science [AIIMS] — payment issue with aiims 2018

I am a canditate for aiims mbbs 2018 entrance examination under the registration no. [protected]

I have completed the 2nd step i. E. Pay registration fee through online mode on 2/6/2018 and i received a confirmation message on my mobile from my bank (Sbi) that payment of rs.1500 is successful. But on screen a server error message popped up.

Next when i logged into my page, it is shown that my payment step is incomplete and hence i could not proceed further.