Shocking service from Land Rover Waterford

I am beyond disappointed with the substandard service I have received from Land Rover Waterford. My Range Rover had its gearbox cooler replaced (bought from Land Rover Waterford) because he had found water leaks , cut a long story short there was evidence of oil that was now mixing in the cooler (this wasn’t happening before the cooler was purchased and installed, after making contact with the dealership and being bounced from pillar to post by the dealership we were then asked to deliver the car to Land rover so that they could do their own assessment before refunding/replacing the cooler. The car was delivered (for the first time) on the 27th March, it sat in the dealership with no attention been given to it until the 4th of April, we were then told to pay a fee before taken back the car and the mechanic was instructed to fix all water leaks before the car could be assess (this is absolutely diabolical as the car had been sitting there for a week) my mechanic fixed the leaks and returned the car on the 14th of April (once again it sat for a few more days without being asses as we were told THEIR internal processes had not been followed, after countless calls we eventually got feedback only on the 23rd of April (another week of waiting for the car) that the assessments have been done and a report has been set to head office to either approve the claim or request further test be done. This gives no timelines or way forward and we have had shocking service from Bryce (the Service manager). You would assume a premium brand would have a bit more respect for its customers. I would like Land Rover SA to give me urgent feedback on this as my next step is to share my experience on social media and will keep escalating this matter until there is a resolution.