Apollo Pharmacy — mamypoko pants took rate of mrp

Address:

EWS 330PID No-23/1001 Navanagar Hubli, Dharwad, Karnataka, 580025

I have purchased Mamypoko Pants of Lsize 80 pants but they earlier told an discount of rupees 400/- rs but later when they remoed a bill they took full MRP of rupees 1249/- so please sought me back my 400/- rs back. And I earlier asked in 'MEDPLUS' they told they will give 400rs discount . Please help in return of my 400 rs.