Help! Scorching sands

[xerox]

in this mission at the starting i defeated the incoming bunch of exploration vehicles and rest but then they start attacking me with lots of tanks and with my little force i could beat a normal attack maybe but it is definitively impossible face 60 or 70 tanks coming up the slope all together. I captured at the starting some of em but they were destroyed and now it would be a suicide throwing my soldiers again into the enemy massive attack to take another one.
what could i do? i ran out of 88´s and their number is still rising up I am defending with 1 british tank and grenades but now that pathetic defense is being crushed by 10 big tanks at a time. And the worst part is that before their tanks can beat me, their infantry takes a position in the hill and i get mission failed.

PD: Sorry for my bad english