Water damage to ceiling from unit above?

Hi there,

Can you please advise me on how best to resolve the following?

The unit above mine has two bathrooms and over the last 12 months both bathroom membranes above have failed which resulted in damage to my two bathroom ceilings. 

The Strata Committee and Strata Manager have finally had both membranes repaired in the unit above me and I have sent photos of cracked plaster ceilings and stains requesting this to be repaired. The Strata Manager has advised the Chairman that the OC does not have to bear the cost of repairing my ceilings but the OC has paid for the unit above membrane repairs which was the cause of the damage. I understand that the repairs for my ceilings is $500.00

I am really puzzled by the Strata Manager as I understand that the Chairman is supportive that the OC pay for the repairs and has asked the strata manager to do so but the Strata manager has responded that there must be an extraordinary general meeting called to vote on this?

Any advise would be greatly appreciated. 

kind regards

Floyd0