REFUND/RETURNS POLICY

Hello Makro. I purchased a laptop on the 14th Dec for my son as a birthday gift for him. However he informed me that he was not satisfied with the laptop as it didn't meet his needs being a student. I went to the store on the 16th with all the necessary documentation to get a refund and to my surprise was informed that I could not return the laptop for a refund as the packaging had been opened. NO sales person at all informed me that if the seal was broken that it could not be returned!! Aside from the seal been broken it is still in its original packaging. Please explain where does it state in Makros exchange policy that Laptops specifically cannot be returned if the seal is broken. I am very deeply disappointed about Makros returns policy as I have now given my son a gift which he has no use for. A gift which cost me as a single parent a lot of money!!!