Here is how to contact samsung if you have a support issue related to accessibility or you want to submit a feature request or leave feedback. The toll-free number is: 1-888-987-4357. You can also email: k.green at samsung.com. Note: i've deformatted the email address so that it can't be spoofed off of our site.
I have not called this number for support and can't speak to the quality of the assistance you might receive.
If you are looking for accessibility contacts for other manufacturers, please check the resources section in the main menu bar.