Undergo fraxel laser resurfacing therapy.. otherwise few creams also available...for detailed prescription do direct online consultation

If possible you can undergo laser resurfacing or if going to clinic not possible then you can use proper sunscreen and a retinol based serum to reduce redness and scarring.

Yes you do have acne scars, and they cannot be managed just by topical medicines to apply. You would need to get procedures done, for improving your scars. You can consult for the same. For the redness on face, does it also happen with spicy food/ hot food? Or only with sunlight? This symptom requires evaluation for cause and diagnosing.