Srilankan Airlines — Bid and upgrade

1. I booked my ticket for Jan 6, 2022 : Jakarta - Colombo / Colombo - Mumbai
2. On booking ( Dec 27, 2021), I received email fom SRILANKAN AIRLINES taht i am eligible for the Bid to get Upgrade offer in business class.
3. I applied for the BId
4. Based on my offer, airlines replied me with statement as below
a. upgrade offer will be informed between 48 and 5 hrs before departure ( means between Jan 4, 2022, 12:40 to Jan 6, 2022, 08:40)
b. Another important as marked & highlighted : MODIFY & CANCEL UP UNTILL 18 HOURS BEFORE DEPARTURE ( means before Jan 5, 2022 ; 18:40 hrs )
5. ON THE CONTRARY, Srilankan airlines confirmed my UPGRADE OFFER MUCH MUCH BEFORE 48 HRS TO DEPARTURE ( 80 HRS), OK THATS NOT A ISSUE FOR ME ( but its a issue if i cannot cancel after upgradation)
6. Due to some reasons, i had to cancel my travelling and i cancelled my ticket ( that was earlier booked by the agent and also cancelled by the same agent)
6. BUT I NOT ABLE TO CANCEL NOT ONLY JUST BEFORE 18 HRS OF DEPARTURE BUT MUCH MUCH BEFORE 18 HRS, ALMOST 80HRS OF DEPARTURE.
7. When i not able to cancel it, i immediatey start connecting with Srilankan airlines to all possible locations like indonesia, delhi colombo, they told may be some some IT technical error so wait for some time but still not able to get cancelled, I also sent emails to all repective srilankan available windows but it took so many days to reply me saying they are in process of making the Refund but after so amny days passed, finally on Jan 20, 202, airlines replied that cannot REFUND by sharing me their UPGARDE BID Policy that was not in same line to the email i received from the Airlines .
8. Wharetver their policy for refund, i respect it but i need answer for my understanding where i was wrong that i cannot get refund
That's what i am asking the reason for NO REFUND, You and your team giving writing me terms & conditions based on guidelines prepared by the airlines as a general BUT i am writing every time for the REFUND based on the terms & conditions what i received on email for the BID upgradation offer from airlines that i already attached many times.
i. How can AIRLINE mention in the offer terms for the cancellation of BID 18 hrs before departure ? but PASSENGER cannot cancel even 80 hrs before departure .
ii. How can AIRLINE say Offer confirmation will be done between 48 hrs to iii. hrs before departure but confirms 80 hrs before departure.
iv. If AIRLINE terms & condition for NO REFUND after OFFER CONFIRMATION then above point 1 & 2 are not valid at all, It means AIRLINES has CHEATED the PASSENGER to make money by giving WRONG TERMS & CONDITIONS in the OFFER but after BIDDING it is not agreeing on email condition and using its own FABRICATED TERMS & CONDITIONS. sorry to use such hard words for the airlines which i always preferred to travel, but money always matter, i cannot get my money wasted if i am going as per the rules
Above all i did not withdrawn the refund earlier but after canceled the ticket only i initiated for canceling the upgradation

kindly review my points and help me for the refund