leads mass converted but not available as account/contacts

leads mass converted but not available as account/contacts

Hello Zoho Team

I have just mass converted 3 leads but they are not available as Accounts/Contacts.
If I launch a search by name they still appear as leads but when I try to access to each lead a warning message says "Sorry, you cannot access the lead".

In the end I don't have in my db any more these 3 names.
How can I recover these names? Any suggestion?

grazie