WorkCover, weekly payment suddenly missed

Hi, been on WorkCover for roughly 6-8 weeks, receiving the regular fortnightly payment as normal. Received the payslip on Monday, pay usually is not far behind it on the same day, although the actual payday is Wednesday on the payslips. Well yesterday came and went, no pay, and no response from the employer, which is unusual . I'm still within certificate range, had the review with Dr and consultant yesterday it was extended to 14th Jan. I called the insurance person allocated however no answer and don't expect a swift reply.

What's the best course of action from here ?