Terrible service

I ordered stuff for R11000 on the 29th of April and paid on the same day. I am supposed to receive my stuff ok n the 13 May, I get a email to say my stuff is delayed and I will receive on the 16th, I sent an email today to find out why my stuff is not shipped and I am told i will receive on the 20th. What the heck is actually the problem with them I am so frustrated because I needed to stuff urgently and they keep delaying and I am losing money in the process.