Can't turn off unlimited off-peak data and support refuses to help me.

I've been in contact with Rain support via email since the beginning of the month because the option to turn off unlimited off-peak data has been removed from their website. I want to be on pay-as-you-use (R50 per GB) but initially I received a reply email from them (on 5th February) stating that they're in the process of upgrading their systems and that they're unable to help me. Then 3 days later (8th February) I received another email stating that my "services will run as 19hrs unlimited moving forward." which is not what I wanted at all!

I rep**** telling them exactly that and I haven't heard back since, I've sent reminder emails about this issue and even tried contacting them on Twitter but they're just ignoring me. This is absolutely ridiculous and I refuse to pay R250 for something that I don't want and can no longer turn off as I was able to in the past! Rain is the worst company I've ever dealt with.