Myntra.com — denim shirt

Address:

house no. 714, opposite municipal council, deep complex, ward no.1, Hoshiarpur, Punjab, 144203

2 buttons are missing in the shirt i got on 16 july... And i cannot exchange it because i m not getting the same size, i want size 40... Now where to find same buttons and what should i do with the defective piece when i cannott use it... If my problem is not solved then i m going to put a bad review about this... And i am never going to shop on myntra