false advertising due to not allowing booking

Kulula advertised special prices for flights , upon trying to book on the day of the special online in the evening payment was not allowed to go through , upon going through the site again the seat and price was still available at R608, indicating that there was in fact still seats available. The error happened again and instructed me to contact the call center . Upon calling the contact center an automated message that their contact center was closed told me to phone the next day. I contacted them the next day and was told the price had now changed to R1300 and that the price of R608 was no longer applicable. I was told that prices are subject to availability . since the seat was clearly available on the site yet I could not complete the transaction due to kulula's error and not mine I find this to be a false advertising over deals in order to get more customers to their site. the fact that their call center was closed on the day so that I can not make the booking over the phone seems more strategic to me more than anything else. they still have seats available on the flight as I was offered a seat on the same flight at the higher price so \subject to availability"is false"""