Supersonic not that super

I have had a fibre line with Supersonic for a number of years. They are not the cheapest solution around, but I haven’t made the effort to change service providers. A few weeks ago, I received an email indicating that I was being upgraded to a 500mb line and would be charged an additional R204 per month. I had neither requested nor approved this change. Despite that, my invoice promptly came through for the additional amount, however, my line has not been upgraded. I have also not been able to reach their call centre or WhatsApp line at all to query this. The WhatsApp line is down and the call centre number just rings for ages with no response. To top it all, my fibre line, which I am now paying an extra R204 for is currently down. I have not been able to reach MTN for assistance. Please explore other service providers - this is really not worth it!