ORDERING OF R250 SIM not possible, no response from Support but automated messages.

I have to get a RAIN SIM for my son as he is attending a college online. The college actually recommended RAIN as an affordable supplier of Data. I can not order the SIM. When you try to order the R250 package, it shows as R0 on the payment page. According to the college you must get a tax invoice from RAIN but at MyRain it shows there is no tax invoice available. It makes sense with a R0 amount on the payment page! I have sent 2 messages already to Support and although I received an automated response, I will give them a 3 as a rating, because no response per e-mail as yet from yesterday. I do not know if I will receive a SIM or not. On the "delivery page" it shows as "Qued" but I do not know if I will receive a SIM without any payment. If you do a "test-order" on the R479 SIM it goes straight through to payment and shows the total perfectly, but I do not want the R 479 SIM. The college has supp**** us with a once of Recharge on my son's phone, but specifically stressed that we must order a SIM from RAIN as soon as possible, before the Data runs out. Still waiting for a response. . .