Routing Error No route matches [POST] when submitting - ruby-on-rails

Question

I have created a form but I'm having issues submitting the form, it's not getting the right route, I'm sure this is a simple fix, I'm just not seeing it.
Here are the relevant files:
new.html.erb
<%= content_for :title, "Orders & Returns" %>
<div class="title">
<h1>Orders & Returns</h1>
<p>In order for us to initialise a return of any order, first we need some information.</p>
</div>
<%= simple_form_for("/orders_and_returns/thank_you") do |f| %>
<%= f.input :order_number,
error: false,
label: false,
required: true,
placeholder: "Order Number" %>
<%= f.input :billing_name,
error: false,
label: false,
required: true,
placeholder: "Billing Name" %>
<%= f.input :email,
error: false,
label: false,
required: true,
placeholder: "Email Address" %>
<%= f.input :message,
as: :text,
error: false,
label: false,
required: true,
placeholder: "Why do you wish to initialise a return?" %>
<div class="hidden">
<%= f.input :nickname,
label: false,
required: false,
placeholder: "Captcha" %>
</div>
<%= f.submit "Submit",
class: "button-border center-100" %>
<% end %>
thank_you.html.erb
<% content_for :title, "Thank You" %>
<div class="title">
<h3>Thank you for your message!</h3>
<p>We shall get back to you soon.</p>
</div>
<section class="text-center">
<%= link_to "Go back home", root_path %>
</section>
order_and_returns_controller.rb
class OrdersAndReturnsController < ApplicationController
def new
end
def thank_you
#order_name = params[:order_name]
#billing_name = params[:billing_name]
#email = params[:email]
#message = params[:message]
OrdersAndReturnMailer.orders_and_returns(#order_number, #billing_name, #email, #message).deliver_now
end
end
orders_and_return_mailer.rb
class OrdersAndReturnMailer < ApplicationMailer
def orders_and_returns(order_number, billing_name, email, message)
#order_number = order_number
#billing_name = billing_name
#email = email
#message = message
mail(
from: email,
to: ENV['order_email'],
subject: "You have a new return query from #{email}"
)
end
end
end
routes.rb
get 'orders_and_returns/new'
post 'orders_and_returns/thank_you'
Not sure what I'm missing here, any help would be appreciated.

Answer 1

You must point the route to the controller and action
get 'orders_and_returns/new' => 'orders_and_returns#new'
post 'orders_and_returns/thank_you' => 'orders_and_returns#thank_you'