Hi AnnP,
Thanks for your post.
Could you give me a screenshot of the error message that you are receiving when you attempt to verify your domains.
In addition, please delete the existing TXT record and try to add the domain again. You can create a new TXT record or MX record to verifiy it.
Note: Once you add a domain and attempt to verify it, it can take up to 72 hours for the DNS changes that you make to propagate through worldwide DNS.
Thanks,
Jerry Cen