My team and I created a dedicated work chat to resolve any transferring issues quickly.
I got a support manager involved, who helped us export 400+ files, and an account manager who settled with the customer to increase the account’s project limit up to 250.
We have designated each file for the project’s positions in a separate region since the competitor service does not have the option to view and export data for several regions at once. We’ve had it for a long time, and it makes things easier for many customers.
In the meantime, having learned the exported data format, I set the task for the developer to prepare a script for creating documents with data in our database. And I took over the task of creating projects on Serpstat and their further setup.