Angularjs pagination data doesn't refresh when links clicked - angularjs

Question

I have a pagination factory, which I didn't write, i'm just using, it gets passed the $scope and a string, the string representing the http action.
It works with GET requests however I am now trying to implement it on a POST request and for some reason it is not working. The pagination bar is loaded, with the right amount of buttons. e.g I have 1 thousand records it loads 100 buttons 10 records per page but when clicking the buttons the data is static, it doesn't update.
Pagination factory:
angular.module('customers')
.factory('PaginationFactory', PaginationFactory);
function PaginationFactory($scope, action) {
$scope.filteredPages = [];
$scope.currentPage = 1;
$scope.numPerPage = 10;
$scope.maxSize = 15;
$scope.makePages = function () {
$scope.search_customers = [];
angular.forEach($scope.get_list, function (item) {
//Push the items into the list...
if (callerAction == 'search_customers') {
$scope.search_customers.push(item);
}
});
};
$scope.$watch('currentPage + numPerPage', function () {
var begin = (($scope.currentPage - 1) * $scope.numPerPage)
end = begin + $scope.numPerPage;
if (callerAction == 'search_customers') {
var pages = $scope.filteredPages = $scope.search_customers.slice(begin, end);
return pages;
});
$scope.makePages();
}
HTML:
<ul uib-pagination
total-items="search_customers.length"
ng-model="currentPage"
max-size="maxSize"
boundary-link-numbers="true"
rotate="false">
</ul>
Post request:
$scope.searchCustomers = function() {
$scope.status = $scope.selected.charAt(0);
$http.post(API_URL+"v1/customers/search", $scope.searchData)
.then(function (response){
var action = 'search_customers';
$scope.get_list = response.data;
console.log($scope)
new PaginationFactory($scope, action);
}, function (response) {
console.log("no data");
});
If anybody could help would be appreciated. Thank you.