Why in the Energy Corridor (Turkey) natural gas is more expensive than Europe?

Although Turkey comes to the central position as the energy corridor, Turkey in the 29 EU countries (including Turkey and Uk) has the most expensive price of natural gas which ranked as #9. In the same period ( 2018–2020) Turkey had raised the gas price higher than other EU countries. European countries are paying 110–120 USD per thousand cubic meters of natural gas however in Turkey that numbers are 250–280 dollars. This situation is directly reflected in people pockets, they cannot use natural gas comfortably. Okay, but why?

The photo was taken from Tanap.com