Looks like trouble in gmail that you use as mailer.
Can you try to set your sender email (abcotex.llc@***.com) as store email (instead info@***.com) ?
Looks like google don't like when sender email address not equal real sender account
after replacing the files codes you advised i found that the form is working but all emails forms appearing only in the sender (sent box) only and not appearing in the inbox or admin messages notifications as also it is printing all form's fields the required and not required fields.
1. Try to create and send new email from you to yourself (email loop) via email page (gmail etc) and let us know if you got this email in the inbox.
2. Regarding uploaded files. There are two limitations, first in on php.ini side. see
post_max_size,
upload_max_size.
So if you plan to receive files via contactUs form you should to test with some small images and then increase values of php-directives.
Second limitation related to mailer. Usually mail server do not send emails greater than 7Mb.
Regarding other data.
I'll test this part of code a bit later and let you know