Employer Contract Dispute Resolution

Dear Legal Advisor I am seeking legal advice regarding several issues with my current employer, an EPC company. Here are the key points: I was relocated to a project site in the Northern Cape, with the understanding that my travel expenses, including return flights, would be covered by the company. However, upon my return, I was informed that only the flight to the site was covered. Despite being promised a salary review, it was not fulfilled, even after discussing and providing documentation of my previous salary. While on the project site, a derogatory email about me was mistakenly sent to an external party. The response from management was minimal, only resulting in a final written warning for the sender. The relocation required extended working hours and impacted my personal obligations, including my right to vote and renew my driver's license. Today, I was given a revised contract that suddenly amends transportation arrangements without any prior discussion, and my salary remains unchanged. I would appreciate your guidance on how to address these issues, including potential claims under the Labour Relations Act.