Still trying to upgrade my LTE Contract

I have been trying to upgrade my current 10GB LTE contract to the 30GB for about 2 months now. I have had promises from them saying they will phone me back, still waiting. I have phoned them about 5 times already and they put me on hold for 40 minutes at a time. I have used the contact me button on their site and that hasnt worked. I then logged a complaint on here 2 weeks ago. I got a reply from Luleka with ref number SM190073 to say someone will contact me or I should send a mail to [Email Removed] So seeing that nobody has contact me me I sent a mail to [Email Removed] and still waiting for a response. This is the worst service I have ever received. Scary to think that i actually want to pay them more a month and I get this kind of service. I hate to think how they treat the clients that want to downgrade. Pathetic at its best