Goibibo — Baggage allowance

Extra student baggage allowance"
Pnr: rlgpdz
As per my conversation with mr tushar chawla (Goibibo representative), i was assured of extra baggage allowance on student visa, after he confirmed that with etihad airlines. I asked him to send a mail confirming the extra baggage allowance but he told me that there's no need for a mail because the conversation is recorded and i can ask goibibo to check the recordings if there's any issue in the future.
Later, i called up etihad on the same day to confirm the same and i was again assured that i'm allowed to carry extra baggage on student visa. 2-3 days later, etihad denied me of any extra baggage allowance on student visa.
I don't know where is the miscommunication and i frankly don't care.
I just want the extra piece of baggage as promised by goibibo on 30th august.
I've made dozens of hotel and flight bookings through goibibo and such a reckless behavior with a regular customer can simply not be tolerated.
Flight is on 16th august and i will need this issue resolved at the earliest within a day.