Sim seems to be incorrectly disconnected from network.

My MTN sim card that I use for data seems to just have been disconnected from the MTN network?

I have recently recharged (last week of April) and still have money on the sim, yet I cannot access it? It just says "Not registered on Network"

I cannot call the MTN call centre as the sim does not work.

Can someone from MTN please contact me to sort this out?

Thanks