private void btnSaveUpdate_Click(object sender, EventArgs e)
        {
            MessageBanner banner;

            if (MyExtension.Validation.isFilled(updateContacts_panel))
            {
                customerInformation = new CustomerInformation()
                {
                    Mobile_number = mob
                };

                if (dbController.updateContacts(customerInformation.Mobile_number, txtUpdateMobile.Text, txtUpdateOtherContacts.Text))
                {
                    banner = new MessageBanner("Successful updating contact details.", 2000);
                    banner.Show();
                }
                else
                {
                    banner           = new MessageBanner("Failed updating contact details.", 2000);
                    banner.ForeColor = Color.Red;
                    banner.Show();
                }
            }

            MyExtension.Validation.clearFields(updateContacts_panel);
        }