If you directed a CNAME to your account and you could not get a verification, this is probably due to the invalidity of your CNAME.

To check, you can use several tools like MxToolbox. Here is the direct link you can use to check the validity of the CNAME you created. For a valid one, you should get a result like this:

If your CNAME looks valid and you still fail to get a verification from us, please contact us.