I'm looking to import an old accounting to zoho books, what is the best order to import so that an estimate / invoices / invoices payment are all linked ?

Here is what i've done and doesn't work :

1 - Import CONTACT.

2 - Import ESTIMATES with the same " Customer Name" label in order to be linked (this works for the customer link, but doesn't work on the " Estimate Status" label because zoho change "invoiced" to "draft" ).

3 - Import  INVOICES  with the same " Customer Name" label and "same "Total"  label in order to be linked (This doesn't work because invoiced are not linked with the estimate). 

4 - Import  INVOICES PAYMENT  in order to be linked with INVOICES (This works, all my invoices becomes "payed"). 

Hope someone can help me. 

Kind regards, 

Sidney