Airtime ******* by MTN

I loaded R20 airtime at 6:22am this morning. When I call the system tells me I do not have airtime. When I use USSD code 136 still it shows me I do not have airtime. When I call MTN and I spoke to Thandiwe Nxele I've been told they can see my R20.

This is ******* for me. They can't even give you a reference number for the complain. I was told to call after an hour but I dont see a difference in that because I have been waiting for my airtime to show from 6:22am but It hasn't shown. I have good grounds to sue MTN for robbing me my R20 as I need it for something urgent.