I have seen the WPC accept 30 hours of flying upto 5 years
I doubt they will accept beyond 5 years
Otherwise you need to pass Part 1 again . Once you pass it you can apply for a lifetime validity license
RTR A licenses can only be renewed from the office that initially issued them
Once you renew the RTR go and renew the FRTOL ( I am assuming its expired ) on the basis of a new RTR and valid Class 1 medical
As for renewing the CPL all you need to do is a FAM flight followed by GFT by day and GFT by night ON ANY aircraft endorsed on your DGCA CPL
Please make sure you have the ELP test done prior to any flying