Proof of address issue

I have been trying to upload my proof of address but it keep on telling me that “the proof of address can’t be changed” and I don’t change anything on my address.
What might be the caused and the solution

Dear @boyship-aegises-2, thank you for joining our community. We are sorry you are facing such an inconvenience. Kindly reach out to us via LiveChat for better assistance and protection of your account’s data. We’ll work with you to resolve any issues as quickly as possible. Thank you!