Remove Temporary URL

My domain https://www.singlesuddenly.com was moved to another host. Prior to the domain transfer my technical person used a temporary URL https://www.singlesuddenly.startlogic.com. Unfortunately after the domain transferred I couldn’t get my URL https://www.singlesuddenly.com back. All my posts are labeled as https://www.singlesuddenly.startlogic.xxxxx.com. Is there a way to get Startlogic (ie https://singlesuddenly.startlogic.com/2011/09/07/revving-up-your-energy-level-with-vault-fitness/) out of my post links and URL? Thank you!!!