Nondisclosure of production location and delivery time

Super unhappy. I am promised a 7 day lead time on ordering 50 branded USB sticks. I ordered and paid 3500k on 8th May. Today I get an email showing me on a tracking record that they have been made in China to arrive on 22 May in Cape Town. My event is on 21 May in Pretoria. I feel mislead regarding both the production location (website is all South Africa) and the guaranteed delivery time. These USBs are going to be completely worthless if I don't have them in my hands on 20th May...and then I want my money back..😡🤬