Terrible Communication and Customer Service

I am very unhappy with Rentoza. After explaining in detail why I needed my device I am first told last week by the end of the week. Then its that they are going according to aged orders, I am then advised on Twitter that my order will be scheduled by delivery tomorrow which is Wednesday. 8 days since order was place. Then the same agent tells me she did not say Wednesday as she doesn't know and they are working overtime. Why is it so difficult to get my order delivered? There were no qualms when i had to pay R700, did I give them an option of paying it when it suited me? No. I am impatient but what angers me is that I get all these contradictory replies . All I wanted was to get the order delivered by tomorrow as i dont have a device and I am leaving on a trip on Thurs and i needed the device. Nicest part that there is no other way of contacting the company telephonically. They only respond via the website or twitter.