Assigning template after payment

I am new to Joomla and Hikashop. And to this forum…

I am making a website for someone including a webshop (one product for the moment), and finally I think I got it all working. Still a lot of finetuning to do, but there is something that I cannot get to work properly.

I implemented Paypal and CCIdeal as payment methods. And I assigned the default template with the default menu I use for the site to show as the background for the payment procedure. That is working well, except for the last screen… after the payment is made I get a screen with "Payment succeeded" but here the template is not used. (The menu module is assigned to all Hikashop components)
So there is no possibility to navigate back in a proper way.
I attached some screenshots of the paying process.

I hope I made clear what my problem is.

Am I overlooking something? Like I said, I am a beginner, but I hope someone can help me.

Thank you very much.

Perhaps my attachment was too large. Another try...

Thank you very much Nicolas for looking into it and your fast reply.
Paypal has the option to assign a return url and a cancel url.

I will ask CCIdeal if they have a solution for this.