Spice Jet Airlines — unauthorized excess baggage charges

Pnr: tf51qk
Date of travel:[protected]
Departure city: maa
Arrival city: del

Problem: airport weighing scale measured my check-in luggage at 14.9kgs. My personal weighing scale measured at 13.7kgs. And my check-in counter measured the same at 18.5kgs.

I was charged unduly for 3kgs, ie, rs 900/-

Initial payment= 8123/-
Excess charge=900/-
Total payment=903/-

Request: i would like a refund.