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Upon taking a closer look of your form's email alert, I found that you have not selected the "Sender E-mail". That seems to be the reason of you not receiving your submission emails. In all three notification you have added in your form has the same "Sender E-mail" problem.
You should select/add a "Sender E-mail" in your notification as this is required to be added for your notification alert to work.
You can select "email@example.com", "firstname.lastname@example.org" or you can also setup a custom "Sender E-mail" option.
These guides should help you:
Hope this helps.
Thank you very much, I will try this.