Breach of contract

We had an solar and geyser installation agreement on the 14th August 2023 with Solar Mass energy To now after paying the 80% deposit nothing has been completed. Multiple WhatsApp's promises from solar mass energy but excuse after excuse. I was even asked to please remove my post on hello peter with a promise that the contractual work was to be completed in good faith but was again given the run around with new timelines be given all the time. Now messages go unanswered and request for a meeting or a return call is not honored. It is now three month later. Terrible service.