Unable to purchase online rail tickets from Busan to Seoul

I've planned a trip to Busan and Seoul in a few weeks with the hotels booked and everything with the exception of getting to Seoul from Busan. I am planning to take the KTX train on the Gyeongbu express line to view the country side of Korea to Seoul. The issue is that I have been trying to access the Korail site but unable to connect. I have already contacted their customer service for help but no reply. I will be leaving to Seoul after staying in Busan for 3 days.

If I am still unable to buy the tickets online, I plan to go to the train station in Busan once I land to see if train tickets are still available. Do train tickets of this travel sell out quick? Are there other sites that allow me to buy train tickets for this type of travel or is Korail the only site? I ideally want to take the train to Seoul, and my backup plan is to buy a last minute plane ticket.

Edit: Disclaimer I am just a traveler looking for answers and not promoting Korail in any way.

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How do you buy tickets on the KTX app?

You can book your ticket 1 month before the departure if purchasing it at the train station, and 1 year in advance when booking KTX high-speed train tickets online.

How do I get a train ticket in South Korea?

Train fares from US$22.86 The price for train tickets from Busan to Seoul starts at around US$22.86. Train ticket prices tend to vary based on a few factors, such as the type of the train, the seat class, and the route.

How much is train from Busan to Seoul?

There is no direct connection from India to Seoul. However, you can take the Metro to Airport, take the walk to Delhi airport, fly to Incheon, take the walk to Incheon Int'l Airport T1, then take the train to Seoul.

How to buy train ticket at Seoul Station ♡

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