Let me share a few steps to recover all the deleted transactions to redo reconciliation.
You'll need to recreate all the transactions that were deleted. You can retrieve it by going to the Audit log and click the transaction link on the Event column. This can help you get the transactions back in full detail.
Here's how:
Go to the Gear icon on the upper right panel.
Under Tools, select Audit log.
Click Filter and adjust the following: User: All users Date: when you specifically deleted the transactions like a month ago or this week Events: Show all events
Then select Apply.
On the Event column, recover each transaction by clicking the transaction links.
Please fill me in more questions here if you have other concerns with retrieving transactions and reconciling accounts. I'll make sure to help. Take care always!