[General] Please advise/advice/help

I have a problem with a site login.

I want to send an email, e.g.:

~~~~~
Hi,

I cannot login to my account.

Please advise.

Thanks,
Peter
~~~~~

Q1 Is the email appropriate? Any better suggestions?

Q2 Should I use "Please advise/advice/help"?

Thanks

Your e-mail is fine.

"Advice" is not a verb.

I would write "log in" (with a space). For me, login is a noun and "to log in" is a verb.

It will help the person trying to help you if you provide your username and perhaps other information about your account.

I agree on "log in" and on "advise."