What happened
I had planned travel from my starting destination to the target destination with a stop in Istanbul. My target destination required an E-Visa document. The E-Visa document was approved but there was a mistake on my passport number, which had an extra digit on the end.
The check in desk at my starting destination validated my visa documents and issued boarding passes for both flights. However when I attempted to board the second flight from Istanbul, I was denied boarding as they said that immigration would refuse me due to the extra number.
I was left with no option but to contact the authorities for a new document (but same visa) and rebook my flights. I was told that the problem on the document was a technical issue and I would have been allowed into the country anyway.
In my view there seems to be an inconsistency between their staff at the source destination and Istanbul - if my visa was incorrect, I should not have been allowed to board the first leg of the journey. On the other hand if I had a valid boarding pass I should have been allowed on the second leg. My visa check was already complete by the time I was meant to board in Istanbul.
I strongly believe the TK airline was overbooked because the flight was already delayed, and our apparent denial caused no extra delay.
How can I claim compensation from Turkish airlines?
I am looking to get the money back from the rebooked flight (or a refund of the original flight) and/or compensation. So far the TK customer service has replied without giving much attention to the details and simply saying that it's not their fault.