Well if you can get 25% of the owners to support an EGM you can submit a motion for the tiles to be replaces which just requires a simple majority at the EGM.
The SM works for the OC and so cannot make any decisions so don’t blame them, but they should assist you in organizing an EGM explaining how to do it.
Once you can show the SM you have the support of 25% of the Strata get the SM to obtain quotes for the repair (or obtain them yourself) of ALL the broken tiles (so long as they are common property and sep individual quotes for any that belong to the lots) and have this included as a motion on the Agenda for the EGM.