Walmart order cancellations

I recently purchased 3 poster collections at MSRP from Walmart last week during the 5 minute frenzy. They only told me they dont have it and cancelled my order hours before the expected arrival date a week later. Make sure to speak with a walmart representative and ask for compensation. They are giving out 10 dollar vouchers. DO NOT let companies, especially as big as Walmart get away with taking your hard earned money as a loan when you pay up front and they cancel on you a week or more later. Good luck hunting for packs out there :)