Why don't I receive any email reminders or phone messages when my clients try to contact me

Recently my clients have sent me 2 messages, normally I get notified by an email that the client has sent a message but twice I haven't been, I looked at the settings for the messages and I should be notified by email as well as through a message on my mobile phone, neither happened.

I never changed any settings at all.

It makes matters very difficult,

Could anybody please help?

Thanks, Regards,

Mrs de Weijer