ng-repeat is not updating my mode data - angularjs

Question

I am new to angularJS. I am using ionic framework for android application development. In my project I am calling webservice and getting its response and attaching that response to scope variable to get data on the view. First time webservice called and updates the view as expected but when I call the service again that is not updating my data. It seems as ng-repeat is not working due to some reference loosing problem. But I am not able to find out the solution of that. Although I have tried different solution via using apply() as was mentioned in one of the stack overflow posts. Below is the code of attaching web-service response to the scope variable.
$http(req).then(function (response) {
if (response.data.IsSuccess) {
console.log("data = " + JSON.stringify(response.data));
console.log('Response is '+response.data.IsSuccess);
$scope.companies = response.data.Response.Companies;
}
and below is the line of code using to update the view
<div class="col col-100" ng-repeat="company in companies">
any help or advice
Below is the login code that is calling webservice to update my data
function callLogInService(userName, password){
console.log("user name is " +userName);
console.log("password is " + password);
var req = {
method: 'POST',
url: ApiUrl + '/api/User/LoginUser',
headers: {
'Content-Type': 'application/json'
},
data: {
Email: userName,
Password: password
}
}
$ionicLoading.show({
template: 'Signing in...'
});
$http(req).then(function (response) {
if (response.data.IsSuccess) {
console.log("data = " + JSON.stringify(response.data));
console.log('Response is '+response.data.IsSuccess);
var userID = response.data.Response.AppUserId;
var userName = response.data.Response.AppUserName;
setUserName(userName);
setUserId(userID);
$rootScope.appUserName;
var userIdFromSession = getUserID;
if(undefined == $rootScope.companyIdForSubscription
|| $rootScope.companyIdForSubscription == 0){
console.log("id is undefined for subscription");
} else {
console.log("company subscription id is " + $rootScope.companyIdForSubscription);
$scope.subscribe($rootScope.companyIdForSubscription);
}
$scope.close();
$scope.setVisibilityOdSideMenuIcons();
$scope.getAllCompanies();
}
else {
showErrorAlertDialogue(response.data.ErrorMessage);
}
}, function (reason) {
console.log('reason is ' + reason.data);
$log.info('reasonf log is' + reason) ;
showErrorAlertDialogue("Please check your internet connection.");
}).finally(function () {
console.log("finally is called");
$ionicLoading.hide();
$ionicPopup.close()
});
}
$scope.getAllCompanies(); this line is calling service again