Did you raise this with Fair Trading, who are supposed to supervise strata managers?
If the strata manager is acting on behalf of the strata schemes, their actions are taken to be actions of the strata scheme and it is they whom you should be pursuing.
If the strata manager is acting independently, then your complaints should be with Fair Trading.
By the way, I don’t see how the distressing picture of your mother’s injury (on the GoFundMe page) has anything to do with your issues with the strata manager. I reckon it will turn more people off than it will encourage to support you