I guess the deeds show that you own a percentage share of the land? I cannot say whether it will be possible for the authorities to add the apartment you purchased to the deed as much will depend on the changes that other people have made.
I suggest that you check with the Planning Department whether Town Planning & Building Permits have been issued - and whether your developer has applied for the 'Final Completion Certificate'.
If you can scan part of your deed into your computer as below and email it to me, I can see what online information the Department of Lands & Surveys has for it.
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