Uwins hair false advertising

I've ordered my hair on the current special that has been running whereby yoy buy two weaves and get one for free. I've placed order successfully and to my surprise I only got two weaves on the package, tried to email Uwins for assistance however I got a very very horrible response from them.

This is the response I got from them. Hi dear, I have checked that we were missing the free one for you. Sorry for the inconvenience,and we would send you the free one or some gifts for your next order. Before you order next time,please contact us and we'll arrange for you.

I'm very disappointed tried reaching out for them to send the missing weave not their gifts I'm not interested I need the missing weave as per the adverti*****t, basically they decide for their customers, I'm so disappointed and I've asked for the address to return the goods they never respond.

Why should I suffer for their in competence?

I want the address to return the goods because I'm not happy with the order, the customer is always right, you can't be playing with customers with your false mispresentation on Instagram.