Thank you, cesamaddict. I wanted to answer the same - that the scars are very similar to yours..
I suggest:
A regular 2 mm dermaroller and a 2 mm dermastamp with 35 needles and the suction pump.
Do not buy the dermastamps with the 80 needles if you have serious scars. The more the needles, the harder it is to penetrate the skin (the so-called "fakir effect"). The less needles, the deeper and easier they penetrate and in your case, you really need to go deep. Also, your skin seems to be thick and tough.
You can roll and stamp during the same session. First stamp the scars, then roll them.
If you have lots of scars, it is wiser to treat just one cheek (but thoroughly and densely). When it heals, treat the other cheek.
Roll over the scars but avoid the areas that have lots of pores and no scars, such as in your case right next to the nose part of the cheek. Pores can sometimes react unpredictably to such long needles and you have no scars in that area anyway.
You should also try the Tretinoin cream (we sell it) in the same way as mentioned in the link cesamadict provided above.
Use the suction pump especially on the large indentations in the middle of your left and right cheek.
How to use the pump:
https://http://forums.owndoc.com/dermarolling-microneedling/subcision-suction-method-for-acne-scarsIf you do not have a high threshold for pain, you may need a numbing cream. Such long needles are painful but we have customers rolling with 2 mm needles without using a numbing cream. It is individual.
I think your scars will improve if you have patience and perseverance. Please let us know about your results (or lack of them).