Fix Australia Website Loading Issue

Our service-based website has suddenly stopped loading for every visitor located in Australia—desktop, mobile, every major browser, all the same blank result. Outside Australia everything is fine. Deliverables (all must be met): • Identify and document the exact point of failure... (Budget: $30 - $250 AUD, Jobs: HTML, PHP, Web Application Audit, Web Development, Web Hosting, Web Security, Website Design, Website Optimization, Website Testing, WordPress)