Bad Customer Service from MTN Mondo

I am extremely frustrated and very angry with Mtn. I app**** for a sim card and router month to month contract through their partner Mondo. They said I have to make an upfront payment of R 320 and I did that. It's been more than a month and I still haven't received the sim card and router. I've been phoning them every day they always tell me that tha caurior people will phone me but I don't receive any calls from them. I am now sitting at my business without internet because I have to cancel my previous service provider. I have asked to speak yo the manager and I am always told that the manager is not available. I have never experienced such a terrible customer service in my life. This is extremely bad. I wish there was anyone who can help either get my money back or the sim and router.