Dubai - Property Size Increase Letter

Hi

I invested in a Dubai property in 2007. It has finally finished and a few days ago 3 April 2016 I received my handover documentation. Within that they included a size increase letter which stated my property size has increased by over 50% and I now need to pay them 463,000 AED within the new 2 weeks. I have never had any previous notification over the last 9 years to indicate there was a change to my Unit size versus what was contracted for in my SPA.

They are stating within my SPA clause 2.5 if the size has increased over 3% of the original size then the developer can charge me for the increase in size. I signed my contract in September 2007.

I have read that under Dubai Law 13 of 2008, article 12 it states a developer can no longer charge the investor for an increase in unit size. Is this correct? And does Dubai law supersede what I signed in my contract?

I also read somewhere that if the specifications of the building changed and I can only assume with a 50% size increase in my unit it must have then my contract is void.

I would appreciate any advice in this matter. My life savings have been held in this project for the last 10 years and since I cannot afford to pay anymore I would have to walk away and lose my investment of nearly 1,000,000 AED.

Thank you