you mention your relative is getting confused with lots of advices, however your question herein is very specific. hasn't your relative consulted and hired an advocate? what is his advice? it may be that he is suggesting a different route to achieve the same end. if you be so kind, kindly share the advices received by your relative, through advocate or others.
and I have, nevertheless, answered your query.
1. yes you can file an application for review, it can be done under certain circumstances, which includes the case put herein by you. but it cannot be said that the order will be in your relatives favour.
2. yes along with an application for condonation of delay. it is a must.