Makro did not deliver despite sms saying otherwise

Friday afternoon I went to Makro's online store, and placed my order. You can tick a box to have them deliver the package at work, so that is what I did, along with providing my work address. Then on Sunday night at 22:00 I get an SMS saying my package has been delivered. I think okay, we have a security guard there 24/7, I can just get it in the morning. Next morning, no package. I think, maybe they made a mistake or it is still coming. I called the customer service help line included in the SMS (same one as online) no answer, and I tried a couple more times. It has now been three more days and I am still waiting for my package that "has been delivered".