Union Bank Of India — I am complaining about the message showing transaction failed, when it's have been done

Address:	152001
Website:	epay.unionbankofindia.com

I was paying the fees of sister via online server given to by the union bank of india for kendriya vidyalaya student. While making my transaction of 2400 rupees. And suddenly it's showing transaction failed but the transaction has been done as the phone no associated with the sbi debit card is showing successful transaction has been done. While calling the given helpline no one is picking it up, rather one is switched off i have been trying since morning and the email id they have given is also not proper as. It shows there are no such user. I don't know what to do please help.