Are the following sentences correct?

1: Should you have any problem, please feel free to ask me.

2: Had he not help you, you could never have succeeded.
Veteran Member5,313
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Had he not helped you, you could never have succeeded.
Senior Member4,115
Retired Moderator: A moderator who has retired.Trusted Users: Trusted users are allowed to use additional capabilities of the site such as private messaging to all users and various other advanced features. You cannot join this role unless you are promoted by an administrator.
Thank you, Tanit.
Trusted Users: Trusted users are allowed to use additional capabilities of the site such as private messaging to all users and various other advanced features. You cannot join this role unless you are promoted by an administrator.
Anonymous:
Do we need to put question mark at the end of this sentence?

Should you have any problem, please feel free to ask me (. or ?)
It is not a question; ergo, no question mark.
Veteran Member88,952
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I found one site explaining this. Check this out! Should you have any problems
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