Can I use your code in my project and how much does it cost?
Yes, all codes are free to use and it should not cost you more than having your developer to understand and integrate them in your application.
Can you help me debugging my code?
Unfortunately, I cannot offer assistance to debugging your project but if you find a bug (or consider it to be a bug in the library or source code), please use the contact form and let us know.
I sent you an email and I didn't get any responses, it's been 2 days.
While I try to respond to every emails, I do have a lot of responsibilities outside of maintaining my personal website. Delays could occur but eventually, I try answering all incoming emails.