Hi @NarelleMaxwell and a very warm welcome to the Community Forum 
As @ziggy mentioned, if you contact Membership Services and let them know what happened they will be able to adjust the star rating for you. It’s great that you are conscientious homeowner and are rectifying this issue for your sitter.
For reference, as a member, you can also add your TrustedHousesitters profile on to your Forum profile by following the attached link, should you wish. This will then enable others to offer you helpful advice and feedback and will also give your listing extra exposure!
If you are unsure how to do this, or if you have any questions at all, do not hesitate to ask, we are all more than happy to help. 