POWER 24 TERRIBLE COSTUMER SERVICE!

I bought Electricity for the first time on my FNB App. I accidently switched two numbers of my cell phone number that you need to put as reference. That was my mistake. But my problem is this. I have tried all means of communication to try and solve the problem on their website, the give a phone number, it goes to voicemail, I left a message, today is just says try again later. A SMS number with different options, no response. An email address, no response. Sent a message to the site manager, no response even though it says it was successful. I am so frustrated; how can a company operate like this. I have the proof of payment and my meter number card to proof I am the one who paid for the electricity. Please can you contact me urgently!