German campaign: Second Mission Hot Sands - Need Help

[Wolly]

Hallo

What I have to do in this mission? I hold the positions on the hills. The supplies of the English troops however always continue! I play the mission already for a very long time, but the game comes not to the end. New tanks of the English Troops come again and again.
Do I have to do somewhat certain in order to win? The game says only "Hold the Hills".........

Thank you for your assistance!