Billdesk — amount deducted but payment failed

Address:

Cuttack, Odisha, 753001

I was paying to nmat by gmac as registration fees. I paid through paytm a high sum of money, the amount was deducted, paytm also showed a successful payment but nmat website showed payment failed. Nmat people say payment has not been made by paytm & after investigation i found that even paytm made a successful payment. Paytm say they have paid to billdesk but billdesk haven't yet paid to nmat.