False advertising

My son placed order ***. When setting up the gazebo, we noticed the FREE included side wall was not included. <br> He emailed you guys to send the missing item. Today, we received an email that you contacted the seller and that it is not included?? Why was it advertised as being included, furthermore this item was on daily deals.. Do you guys not check the accuracy of your adverts before placing on special ?? Then, you guys take it upon yourselves to simply change the item page WHILE THE ISSUE IS BEING SORTED.<br> <br> Returning the item also doesn't rectify the issue.<br> <br> Why do you advertise one thing and then suddenly its becomes a \mistake\" when we take you up on it?<br> <br> I am disgusted by this service... This is what you call false advertising and will definitely be taken further by me(if it is not rectified).<br> <br> If you expect us to pick up your errors and inadequacies... Then at least pay us!... Since your staff clearly can't do their job. <br> I expect you to make good on your advert of delivering the extra side wall, even if it entails sending the sidewall separately as you do sell it in any case.<br> <br> I have a screen shot of the original page. The CPA does not allow you to do this!!"