Access child supplier profile management

Hello,

we have requirement. our customer creates new supplier whenever they get new supplier name and tax id.  Along with creating new supplier they also duplicate the contact and user account from old supplier to new supplier.  This causes huge manual work.

We tried to link parent child link between old to new and grant the new supplier account to contact of old supplier.  Once the contact login to iSupplier we couldnt see the new supplier under profile management.  Why i couldnt view new new supplier profile from old supplier contact information?

Do we have any alternate way during this kind of business condition?