Kevin 1210

Hi All, please could you help me out. I am aware that students are able to work for a maximum number of 40 hrs per fortnight during semesters. And each semester is considered including exam periods. My university had advertised as below Final assessment period : Saturday 16 – Saturday 30 June 2018 I had unintentionally started working 40 hrs in one week on the 25th of June (before ending of the exam period). However I had already finished all my assessments. I am now worried that I’ve technically breached my visa. And what will happen to me? It was really an unintentional mistake, as I thought I was allowed to work unlimited hours when I’m on holiday. Please advise! Thanks kevin