I went to Hyundai Paarden Eiland (Cape Town) with one issue and they detected that my clutch needs to be replaced

I went to Hyundai Paarden Eiland (Cape Town) with one issue and they detected that my clutch needs to be replaced. This was done. On my way there, I realized that my heat gauge was increasing and brought that up too. They say this is normal, even now when my heat gauge is 3/4 high. I have spoken to other Hyundai dealers and they say that this is not normal. My service advisor was very helpful but I am not getting assistance regarding my current issue.