Hello sir,
I have read your project description,
I hope you I can assist you to fix the paypal checkout issue,
I’m an expert Web Development with more than 5 years experiences on Wordpress, PHP, OOP, MYSQL, MYSQLI, JAVACSRICT, BOOTSTRAP, HTML, HTML5, CSS, RESPONSIVE etc.
I'm a full-time freelancer, I can contribute time and energy to the finish your job.
Regards:
Nizamul.