Completion of forms against spam

Corporate website on WordPress.

10 landing pages are the order form made through the plug-Everest Forms.

Through one of the forms is constantly spam, which complicates the processing of applications.

Should:

the field "phone number" to make the ability to enter numbers only, max 12 characters. And just to make a mask 38(0ХХ)-XXX-XX-Chhole "name" reduced to 32 characters, and check if there are any links. the field "information" - check the links in the link display a warning that the links are prohibited

Full TK: https://docs.google.com/document/d/1nh-Nz7y0qU_4Jd_DUQ53CiSiySh6V-F8LQRq_khkqs8/edit?usp=sharing