unsubscribe shortcode in a page

Hi,
I would like put the subcribe and unsubscribe shortcode in the same page (home)
so I use the code bellow

<div style="padding: 20px; margin: 50px 0 0 300px; width: 250px;">
<div style="width: 250px; border: solid 0px; margin: 0 0 20px 0; padding: 10px; overflow: hide; background-color: #ccd7db;">S'inscrire :
[sp-signup firstname_label='Prénom' lastname_label='NOM' email_label='EMail' list_label='List Selection' listids='18,190' display_firstname='true' display_lastname='true' label_display='true' label_width='98' thank_you='Merci de votre abonnement!' button_text='Envoi' no_list_error='-- Aucune liste ! --' ]</div>
<div style="width: 250px; border: solid 0px; padding: 10px; overflow: hide; background-color: #ccd7db;">Se désinscrire :
[sp-unsubscribe-form placeholder='Email' label_width='98' btntxt='Envoi' ]Votre demande de désinscription à bien été prise en compte.[/sp-unsubscribe-form]</div>
</div>

The first one (subscribe) works well. The second one always cause the answer url
http://mairie-saubens.com/wdps/smalin/?sendpress=post[sp-unsubscribe]=true
which is a wrong one
I sent several mails (sorry so much) to help@sendpress.com unfortunatly the response is an automatique one and I’ve already done all what it’s suggested.
Could you, please help me to set an unsubscribe way in a page ?

Thanks in advance
JPe.

https://wordpress.org/plugins/sendpress/