Agents communicated wrong info 3 times & were rude

I called Turkish Airline call centre to inquire about the cancellation policy of my flight, the first agent told me it was 100% refundable but I had to speak to the agency that made the booking for me to give me the refund. I call the agency they say it's non-refundable, I call TA again they say it's partially refundable, I asked to make a complaint about inconsistency, and they transferred me to customer relations. They asked for the number I'm calling from to trace the agents, and the person was rude and told me there's nothing he can do for me, when I said I was calling from Skype. I called again to give them the Skype number, and while at it I asked about cancellation policy again, and this time the agent told me he can't even share this info with me!! I asked to be transferred to customer relations and he said it's against the policy. I had to yell for him to do it, and then I spoke to customer relations they told me they can't even trace call agents and there's nothing they can do for me! All the time they were very rude and couldn't even speak English. I had to repeat the same story at least 3 times for each person to understand! Worst service ever. Seriously AVOID!