My mom wants to visit me in Singapore but when she applied for visitor VISA, she was told that she needs to return her IC. She was told that once she leaves singapore with an expired REP, she is deemed as giving up her PR.
Hence, I returned my mom's IC on her behalf to the ICA last week. Now, my mom needs to apply for visitor VISA but she was told by the agent that she will likely be rejected in this case.
What should I do now? My mom still needs to come to Singapore to deal with the CPF and bank account issues. She also wants to visit me since we are seperated for one year

I am 20 years old (below 21 years old), so definitely my mom cannot authorise me to help her deal with bank account and CPF.
Can someone please help me ?? Thank you all in advance!!!