Bad service

I ordered textbooks for which my company is paying as its my final year. of the four textbooks i ordered only one arrived. I did complain and was advised they investigating . While i do appreciate them investigating its been over 2 weeks and the only reply i receive is that they are still investigating how long does it take to investigate. This will impact my studies and this is the first time i have experienced this with Van Schaik bookstore they are usually on the ball