I'm having similar issue. What's the way forward. After dialing 853 and selecting the option to complete Sim swap, I'll get a prompt that'there's no pending sim swap on the line...
I am deeply sorry for your missing line.
Kindly contact your bank to prevent an authorized access to your bank account if the line is linked to your bank accounts.
Sim swap by...
Y'ello. Sorry about your lost sim. Kindly visit our office with your NIN card/slip to retrieve your line. The welcome back SIM cost N100. However, you may be required to buy...
I am sorry about your missing line.
You will not be able to do a sim swap on a line that was not registered by you. However, ask MyCustomer who registered the line to visit...