I did not sign-up for Upwardli. What can I do?

To dispute a posting on your credit report you can dispute by mail or online. 

To dispute by mail, send the financial institution a copy of your credit report, copy of identification, a letter stating what you are disputing, and a copy of bank statements or other supporting documents. 

To dispute an item online, click on the link for the credit bureau you would like to dispute with.

Equifax: https://www.equifax.com/personal/credit-report-services/credit-dispute/   

Experian: https://www.experian.com/disputes/main.html   

TransUnion: https://www.transunion.com/credit-disputes/dispute-your-credit