Indigo Airlines — Boarding Denial

I was denied boading a flight from DEL-AUH as I didn't have rapid PCR test. But AUH guidelines doesn't require rapid PCR tests for transit passengers. I had an onward flight to YYZ and also 48 hour transit visa.

Abu Dhabhi airport website didn't ask for the rapid pcr for transit passengers and also indigo website has the same written in it.

I need a resolution for this case as I lost money for both DEL to AUH and AUH to YYZ tickets.