My line is out of service since two days ago, what can I do to restore it back.

I lost my WiFi some days ago, So in position that my simcard was lost with it, Please block it so that it will not be used again for fraud. +2349069052448

My phone was stolen some weeks ago and I contacted customer service to block the line for me and after two days I went back to a MTN service center in Osogbo to register my SIM...