Hello, This is Sukhjeet Toor (Web Development Consultant)
Note:- Our no. 1 key is proper "COMMUNICATION" during the project.
As you are asking for fixing the notification error on your application. This task can be done. But I would like to know more in details so that I could guide you with proper flow of task how we are going to deliver this.
I am an expert in application creation on Android and IOS having 6+ years of experience.
I would also like to know what are your active hours on freelancer.com just to know if we can work in the same timeframe.
So, I will suggest you come over chat so that I could consult you in details in order to provide value as this project needs.
Regards
Sukhjeet Toor