Sale Of Flat

only remedy is go to court and take probate of that Wii as soon as possible.

Say that the Will is false/forged if you have reason and evidence to say so. Also file criminal complaint against persons you think have made false/forged Will. Don't raise false allegations against any person. Proceed with caution. If Will is genuine then don't raise unnecessary legal dispute or you can be punished by court for perjury and malicious prosecution under penal code.

If Will is there then you have to act according to the terms of Will only.

Whether will is registered? how she gets the property?.. To whom the property was bequeathed?.. Need to know these details for further assistance..

First thing you need to give more information about the property, how that property come to your Grand Mother's name.