Flipkart — Wrong size delivered

Address:

Faridabad, Haryana, 121005

Sir, I have placed the order for jockey men vest VA50789 size Medium and qty 2 pieces on 2/04/17 but delivered wrong size XL instead of ordered size medium. My invoice no is F0P7Y[protected] . How the wrong size delivered to me, what is your check points before delivering. now need to resolve this matter on priority and Pl replace this with right size.