There is virtually no chance of getting an extension. Acceptable reasons for granting an extension are death (your own or that of a spouse or child), accident injuries that meant you couldnt fly or a military posting abroad.
If you have a CPL issued then you will be credited with VFR Comms. and nowt else.
The only bright spot is that you wont need to go though the study again (at the discretion of the CGI).
It's all a bit bollox really.