Wrong Hours On Payslip

Hi Everyone,
I hope you can assist me. I work in a not for profit company in Sydney and since May this year I alerted them to inaccurate hours on my payslip (I was accruing too many and I wanted to know how much leave/ and sick leave I had so I could plan things)
I emailed HR and they told me there was some IT issue with the system they would get sorted and let me know. Since then I've left a couple of voice mails and emails but I haven't had a response.
I have not yet informedy manager as I thought HR would sort it out.
Do I have any legal rights here, as in any say in taking the leave they have printed for 6 months that is on my payslip? Has this happened to you before?
Amy guidance appreciated.
Thank you

Thanks for your reply. I would be kicking up a bigger fuss if it was too little hours, but the issue is too many hours. Nonetheless it does make it tricky to know how much leave I can take. I will pursue it futher...
Does anyone know if I would have any right in keeping the hours they have assigned to me over the past 6 months, though they have acknowledged the error but not corrected it for 6 months.
Thanks!

In my opinion, if despite your sincere and persistent attempt, if your company is adamant on showering such blessings on you; it is time to bask in the glory. Since you have done your best, let tomorrow take care of itself.
While taking or applying for leave; do it to the extent you think you are entitled for. (Of course, this suggestion is redundant, as an honest and upright person, you would definitely be doing it).
Warm regards.