my version solve.py

class Person:
    def __init__(self, name, middle_name, surname, private_work):
        self.name = name
        self.surname = surname
        self.middle_name = middle_name
        self.private_work = private_work

    def get_phone(self):
        if "private" in self.private_work:
            return self.private_work["private"]
        else:
            return

    def get_name(self):
        return self.surname, self.name, self.middle_name

    def get_work_phone(self):
        if "work" in self.private_work:
            return self.private_work["work"]
        else:
            return

    def get_sms_text(self):
        return (f"Уважаемый {self.name} {self.middle_name}!"
                f"Примите участие в нашем беспроигрышном конкурсе для физических лиц")


class Company:
    def __init__(self, company, type_company, phones, *employees):
        self.company_name = company
        self.type_company = type_company
        self.phones = phones
        self.employees = employees

    def get_phone(self):
        if 'contact' in self.phones:
            return self.phones['contact']
        for employee in self.employees:
            if 'work' in employee.private_work:
                return employee.private_work['work']
        return

    def get_name(self):
        return self.company_name

    def get_sms_text(self):
        return (f"Для компании {self.company_name} есть супер предложение! "
                f"Примите участие в нашем беспроигрышном конкурсе для {self.type_company}")


def send_sms(*args):
    for current_object in args:
        if current_object.__class__.__name__ == 'Company':
            number = current_object.get_phone()
            if number:
                print(f"Отправлено СМС на номер {number}"
                      f" с текстом: {current_object.get_sms_text()}")
            else:
                print(f"Не удалось отправить сообщение абоненту: "
                      f"{current_object.company_name}")
        else:
            if not current_object.get_phone():
                print(f"Не удалось отправить сообщение абоненту:"
                      f" {' '.join(current_object.get_name())}")
            else:
                print(f"Отправлено СМС на номер {current_object.get_phone()}"
                      f" с текстом: {current_object.get_sms_text()}")


person1 = Person("Ivan", "Ivanovich", "Ivanov", {"private": 123, "work": 456})
person2 = Person("Ivan", "Petrovich", "Petrov", {"private": 789})
person3 = Person("Ivan", "Petrovich", "Sidorov", {"work": 789})
person4 = Person("John", "Unknown", "Doe", {})
company1 = Company("Bell", "ООО", {"contact": 111}, person3, person4)
company2 = Company("Cell", "АО", {"non_contact": 222}, person2, person3)
company3 = Company("Dell", "Ltd", {"non_contact": 333}, person2, person4)
send_sms(person1, person2, person3, person4, company1, company2, company3)