Poor customer service from Mark Morgan Nissan Northcliff

I took in my Nissan Almera 2017 on Monday morning after the mulfunction light had been on since Friday. Mark assisted me and I was told there is a water in the left back light causing a short circuit hence the beeping sound. The car was taken by a mechanic for a review and was told I will have to pay from my pocket because the car looks like it has had some work done therefore warrant won't cover the repairs. Mark promised to give me repairs pricing, I followed up with him yesterday (Tuesday) he took my numbers down promised to give me feedback and I haven't heard from him since. Really poor customer service.