Bad service at Rain internet

I got my rooter and sim delivered @ 8h00 on 10 March and Rica'd immediately. I was told that the sim would be activated in 2 hours' time and that I would receive a sms. It is now 15 March, 17h08. Still no internet. This after three phone calls emails and complaining on the app. Though friendly on the phone, none of the promises had any affect. The emails give me a response such as "thank you for contacting Rain. We will get back to you, Tjeers"... Tjeers? I am not drinking something. In my last email I said that I am going to cancel the contract if I do not have email today. This is bad , because my daughter, as a first year university student, needs internet urgently...