Air India — kyc rejected multiple times without credible reason

My flying returns number is[protected]. I've uploaded my kyc document (Passport) 3 times, giving a better resolution scan copy the 3rd time. But every time, they reject my kyc stating that the passport number on my first page of passport doesn't match with that on the last page, which is weird because passport number is only printed on the first page.
Same scan copies have been accepted in banks which is supposed to have the most security feature.