Ability to Unmerge Contacts or Tickets

Hi, we recently have a joint customer account in FreshDesk who now want to go their separate ways. Even though the mobile number has been deleted from the contact to create a new account for the other customer, any calls and text are still creating and logging under the previous joint account. We’re aware we can completely delete the contacts to start from scratch but we don’t want to loose previous tickets/communications with the customers. Is there a possibility to have a function allowing us to unmerge customers or tickets please?