Singleton | Login To See Price

The developper came back to me quickly to fix my old issue.
which was :
Your app is very basic. it hold a button front of the price. You can even not click on it to be redirect on the loggin page...

Then the presentation of the button on my home page was ugly and duplicated 2 times under the product. Which gave 2 big blocks said to log in to see the price.

Finally, once logged in, when I wanted to buy the product, an error message now appears. So I can no longer purchase.

I wanted to delete the app but impossible because it introduces the code directly into your template. So impossible to go back than contact them. We are the weekend .... My site will probably remain off all the weekends while waiting for their return to withdraw this product which in addition is paying.