National Board Of Examination — double payment of neetpg 2018 fee

Website:

neetpg.nbe.edu.in

Hi, my candidate id fpr neetpg 2018 is [protected]. I tried to pay exam fee of rs. 2750 on 1st nov and i got the error message "your action could not be completed due to an exception. Please try again later."
So i tried paying from another bank account but i got the same message again. Both times, the money was debited from both accounts.
On 4th nov, i saw that one of the payments had gone through, however i still haven't gotten a refund on the other account as i have paid twice.

I have tried calling customer support many times but the line is always busy, and e-mailed them as well but i got no response.
Please refund my money of rs. 2750 as it has been 24 days already.