Terrible customer service after sale

I tried to purchase the products I love with the 25% discount MAC was offering, however after receiving no confirmation of order after I paid, I thought something was wrong. I have tried calling and emailing MAC about my order that I paid for but wasn’t processed on their side. I have waited 3 days for a response to my email (with a response that doesn’t help me at all about how they will email me once they have credited the card I used to pay) and no calls have been returned. MAC, if your system can’t handle online ordering then you should consider refraining from offering online deals for your customers. I’m very disappointed with your customer service in resolving the problem. I expect to be able to order the same products that I paid for the first time with the same 25% discount, given that the error was on your side.