Email not sending

I have created a simple contact form but cannot get it to work.I have tried using smtp port 465 then 587 and finally 25 in case this was the error but no luck. I did get an error about line 21 at one point but that hasn't reappeared.I have created many contact forms and not had these problems though that was with the previous version. Could you point me in the right direction please.

I added the code to display errors and received the following

Fatal error: Uncaught Error: Class 'WA_Email' not found in /home/awieseth/public_html/contacts.php:24 Stack trace: #0 {main} thrown in /home/awieseth/public_html/contacts.php on line 24

That line is this: $Email = new WA_Email("contacts");

I created this from the form and this is what it created so I don't know what is supposed to be on that line.