If the certificate has been lost and you do not have a backup of *.pfx or *.p12 file, then you need to follow the restoration procedure to access your purses.
The restoration algorithm depends on your specific situation and the specific steps that you will find out only after you start the renewal procedure. The complexity of this procedure will depend upon the level and accuracy of your supplied data, the type of passport, and balance of WM-ID purses of which you want to regain control.
In a nutshell, these are your actions:
Consequently, to regain control of the purses you will have to follow through the keys recovery procedure.