Coolwinks — availment of offer

Website:

www.coolwinks.com

I was going to purchase a computer eyeglass on 23/04/2018 from coolwinks.com, while selecting the products & trying there prices there was a coupon available named "get50" which ensured flat 50% off and it was also working while we were checking it and it was also mentioned in coolwinks site that the coupon is valid till 23/04/2018. But from evening while i was trying to purchase it on 23/04/2018 it was not working and showed "coupon expired" or "invalid coupon" even it was within its due date.
This is really unethical from the company. I was harassed, i tried it for about 25-30 times to purchases it but always same problem occurred.
I mailed the company twice but did not got any revert.
It was clearly mentioned that get50 code is valid till 23 april, 2018 but not working from evening.
I want to lodge a complaint against coolwinks.com for my harassment mentally, financially & physically.
And request you to take strong action against the company.


Thanks & regards,
Saurav sarkar
Mb-[protected]