No connection

I brought a 4g unlimited Sim on the 8th April but it does not work, I sent an email to your customer service department. I have been communicating with Palese Molemohi who was assisting me she advised that my sum was active. But I informed her that it doesn't work she stopped further communicating instead of trying to resolve the issue. It means I have paid for unlimited data that doesn't work. I want money to be refunded as I unable to enjoy this service that Rains offers provide. It's seems like it's a market strategy to rip people off