The airline’s system: zero!
The airline’s system is terrible. It is extremely difficult to purchase a ticket online — I was only able to complete the purchase using Apple Pay. In addition, the company is not prepared to serve passengers from different countries. My baggage exceeded seven kilograms and I had to pay an extra fee, but three different international credit cards were rejected due to the airline’s poor payment system. It was a major hassle to pay the absurd amount charged for my 10 kg bag that had to be checked in. They only accepted cash in the local currency, and no non-local credit card was approved by the system. No one from customer service was able to help or reduce the stress of the situation.