Unfortunately the problem is not resolved yet.
I have contacted a law suit in UK.
I have already paid them 1000 USD for preparing a demand letter and starting negotiations with them.
This is the best solution since they took so long to respond, unfortunately there are other complaints on CEX.IO you can look at this thread:
https://bitcointalk.org/index.php?topic=1740998.0CEX.IO exchange should solve the problem at the earliest if they want to keep their reputation clean.