Hello there,
I have read your description and understood all the requirements that you mentioned
I can set stripe payment upgrade and downgrade feature to your merchant panel. Please share merchant URl with me.
I have done similar work in past to what you are looking for.
I am full stack developer having 8+ year of experience in website development. I’m well versed in technologies such as:- CSS3, HTML5, Bootstrap, JavaScript, MY SQL, PHP, cakephp, code igniter, payment gateway integration, Rest APIs
My work sample:-
https://www.freelancer.com/u/anmoltech
It would be great if we can have a quick chat to better understand everything from the end.
Looking forward to hearing from you soon.
Best Regards,
Abhishek