TCA 100% 3 months later and still no improvement, what can I do?

On 1st march very deep TCA done. Scab came out on 30 march from 1st April till date (3 months) still no improvement, see pink (final layer/tissue not coming), can see between, branch like hard hypertrophic scaring. afraid from laser please suggest best topical only if not possible then only suggest which laser name, session. i don't have infection in scar few acne came but treated using doxycycline oral. some time patient are not aware about if laser machine used is right or not so better avoid.