Poor service and unfulfilled contractual obligations

My gate motor was damaged by rain and they sent an assessor who firstly told me that my motor was not the best brand and I have to give him extra money so he can get me a better brand, when I refuse he told me my motor was damaged due to wear and tear. To show he was not even sure of his assessment he took it to the manufacturer for further assessment but still rejected the claim. Standard bank agrees with him but still kept my motor with them. They must either return it or replace it, if returned it have to be returned to its original condition because he even broke the bolts when removing it.