Dishonest Management giving Renault a bad name

I bought my Renault September 2021 . When I got to the dealership to pick up my car I noticed a scratch at the back . The lady helping me with the process , Happygirl is her name , said that because there was a scratch they replaced the battery with a new one . When I got in the car to test drive I picked up that the stop start does not work . Upon further investigation with Happygirl it was concluded the the wrong size battery was placed in the car therefore they needed to give me a new battery that will work for the start stop . When I signed the contract I made a note for my own safety stating that “Renault Must replace my battery with a new correct battery “ . Happygirl signed and so did I . All the communication thereafter about the battery getting replaced was done via email , once again for my own safety . I contact them again this year and I was told Happygirl doesn’t work there anymore so they do not know anything about this . I asked to speak to the manager and he said that my battery will not be replaced it just need to go for service . I kept telling him to refer to the emails and to the contract but he refused . To this day I don’t have my battery and Renault Edenvale is not willing to assist .