Laptop

I ordered and paid 4 a laptop at takealot.com on the 2nd of may and they pomised to deliver on the 7th of may. They delayed my delivery. After tons of inboxes on facebook they promise to deliver yesteday on the 14th of may bt nothing. I decided to track the delivery early today. The status said it was deliverd yesterday at 10 bt i didnt recieve my parcel. They sent me an email saying i have to return the laptop that i didnt recieve. What worries me the most is that i have an online exam in 2days on monday the 18th of may 8:30 am. I really dnt knw what to do now