erpnext- darta migration

we are currently using erpnext, we found some issues in the current system, so we installed new erpnext in a different server. we would like to move data by data import tool , dont want to use back-end side. already moved all item, quotation and purchase order, need to move other things like purchase invoice, sales invoice, jv... we need it really urgent please don't bid if u don't know erpnext...