[Resolved]  Indigo Airlines — charges 5100 extra on luggage

Sir, my name is deepak tomar and i travel from kochi to delhi on flight no. 6e 837 with ticket no. [protected] on 06 may 18.
Sir, due to my extra luggage i have to pay 5100 rupees but my mistake on your side i pay extra 5100 rupee, which also conform my manager present there and they promise me to revert back this money but still no money refunded to me, no confirmatory mail i received, kindly do something for it sir.