When Is Plastic Surgery Required In Disconnected Achilles Tendon ?

my achilles tendon got disconnected and i have got it repaired.this has done 70 days back and still pain is there & also the wound (surgery part)is healed till now. we met another doctor in chennai and we were informed that after the surgery, the doctor left the tendon open idle and so the dead cells are formed around that tendon. Now he is saying the dead cells are to be removed first & later plastic surgery is must. Please suggest what to do now?