How to make a form in ContextProcessor?

Question

Django

Good afternoon. I'm not writing a big project on DJANGO, and a little difficulty arose, I need a form that would be on all pages of my site, implemented through the contextprocessor. Like this

# -*- coding: utf-8 -*-
from django.shortcuts import render, redirect
from django.http import HttpResponse, HttpResponseRedirect
from .models import *
from price.models import price
from django.views.generic import View
from .forms import callMeForm
#from django.http import HttpResponse
from  sms_signup.smsc_api import *
from sms_signup.forms import activations
from sms_signup.models import SMS_PHONE
from sms_signup.views import *
from django.db.models.query_utils import DeferredAttribute





#Контекстный процессор для описания формы сайта
def phone_form(request):
  if request.method == 'POST':
    zvonok_form = callMeForm(request.POST)
    if zvonok_form.is_valid():
      phone_form = zvonok_form
      phone_form_name=phone_form.cleaned_data['name']
      phone_form_phone=phone_form.cleaned_data['phone']
      print(phone_form_name)
      smsc = SMSC()
      ...
      r = smsc.send_sms('79994406745', "Заказ звонка с сайта: " + str(phone_form_name)+ " " +str(phone_form_phone), sender= "sms")
      zvonok_form.save()
      return HttpResponse("OK")
    else:
      zvonok=callMeForm()
  else:
    zvonok=callMeForm()
    return {'zvonok':zvonok}

It almost works as I need, but there was one very strange moment for me when you try to delete something in the admin panel, then a POST occurs to this form.
How do I write the form in the contextprocessor correctly