Wizz Air System Error Blocked Online Check-In and Forced Airport Fee

I attempted to complete online check-in for my Wizz Air flight W95772 from Istanbul to London on November 19. My flight was scheduled to depart at 8:50 PM local time. After check-in opened, I logged into the system multiple times but continuously received an error message saying “Please try again later.” Even after check-in closed and reopened, I kept receiving the same error and was unable to complete online check-in. Although my ticket states “Only check-in at the airport,” the screenshots I have attached clearly show “Online check-in included,” meaning that online check-in was explicitly listed as part of my booking. Despite this, I was unable to use online check-in due to a technical issue on Wizz Air’s system. As a result, I was forced to check in at the airport and was directed to Office No. 5, where I was told, “If you don’t pay 45 EUR in cash, you cannot fly.” In order not to miss my flight, I was forced to pay the 45 EUR in cash, which appears on the receipt as “Airport check-in.” The staff member also told me that I should pay first and then submit a complaint to the company afterward. Because of a failure in Wizz Air’s own system, I was unfairly charged and subjected to unnecessary stress and pressure through statements such as “You won’t be able to fly if you don’t pay.” My confirmation code is BHQKTF. I do not accept being forced to pay at the airport for a service that was clearly stated as included, solely due to a system-related error on Wizz Air’s side. I am requesting a full refund of the 45 EUR airport check-in fee I paid in cash, including any exchange rate differences if applicable, and that the stress and pressure I was subjected to during this process be taken into account.