WHAT!!!!!!

I recently signed up with Rain on their November R1 special where you only pay your first installment in December. All was fine until I noticed this weekend that my WiFi was not working, when I went onto my account, I am suddenly been billed and have R300 extra added to my account. I called customer care and was informed that Rain apparently now bills you in advance. Firstly, I was never informed that I would be charged extra and I was never informed that after agreeing to pay in December, I would be billed a month earlier. RAIN - sort yourself out, your network is not bad BUT your billing and misleading ads are disgusting