we called already the first evening we checked in to inform there were no hot water, but no answer. Also after just 10-15 sec the shower got full because the well was congested and the water didnot go down. The next day we called and informed about the two issues. They later informed via whatsapp that there was an issue with the hot water tank. They would try to fix it the next day but wrote that they could not guarantee it would be fixed. That would mean at least for 3 days we would not have been able to shower properly in a hot country. Also on the next day my mother would arrive to Istanbul, which is the main reason for our trip. Not being able to shower for at least 3 days is not acceptable especially when they could not guarantee the hot water problem would be fixed.
We therefore asked to get our money back so we could use it for another apartment, they refused. We didnt even ask for compensation for not providing what had payed for. This put a lot of pressure and stress in us.
Eventually they offered us to charge us the first 2 nights and give us back the rest, although we had not gotten what we payed for the first 2 nights either. They should offer us back in full and as a compensation for the inconvenience.
We do not recommend anyone to go through the same with VNG.