Ccavenue — payment gateway

Address:

Thane, Maharashtra, 400612

I have paid 947 rupees through upi to purchase a domain where gateway was ccavenue. The transaction was done on 22th august. I complained to icici bank and they gave me account number of ccavenue and rbi reference number for the transaction. I complained to ccavenue, they say they cant find the transaction through rbi reference number. Provide more information. I gave all information more then necessary and six remainder mail so far no reply. I want to ask govt if what is the significance of rbi reference number where company straight way tells they cant find a transaction. I want refund with interest for using my money for one month. If it doesn't get resolved. I am going to have a strong case against cc avenue, upi and so called rbi reference number.