Convert nested cell with unconsistent structure to mat and also reverse operation

I am not able to convert the data in cell format to mat. If it was only of one level we can use cell2mat and its reverse mat2cell.

[KSSV]

What dimension you are expecting at the end?

[GEEVARGHESE TITUS]

2D or 1D

[GEEVARGHESE TITUS]

The cells are non consistent, hence giving me an error "matrices being concatenated are not consistent "