Ibibo Group / Goibibo — Incorrect refund of a partial cancellation

I booked a hotel for 2 rooms for 4 adults for 4 nights (18th -22nd) total amount -75083… due to work issues I had to partially cancel one of the rooms and did so on 16th and recieved the hotel voucher for the continued stay of the other room for 34836/- however I got refund of only 36019 /- .. I hav been asking where is the difference amount and time and again I am getting answers as the executive or their seniors are not able to give a solution. Infact one of the executives told me that it was a mistake and they r poor easing the refund of the 4k to my account.. however next day I get a different call and the executive changed their resolution answers every minute as they don’t have explanation for it … Total amount paid for 2 rooms 4 adults +1 child - 75083
Canceled and refunded amount for 1 room. 2 adults - 36019
Confirmed hotel room (not canceled) 1 room - 2 adults 1 child- 34836

Difference amount - 4228 ...[protected]