How to click apex chart

Am using apex chart (radialbar) for display values but when i click for chart redirect to another page with parameter value. but i try below code but selected value return "undefined"

var _majordemo12 = function () {
		const apexChart = "#majorchart_12";
		var options = {
			series: @Html.Raw(Json.Encode(TempData["chart_majorvalue"])),
			chart: {
				width: 380,
                type: 'radialBar',
                events: {                    
                    dataPointSelection: function (event, chartContext, config) {
                        // Get the selected data point's value and redirect to another page
                        var selectedValue = config.w.globals.series[config.seriesIndex][config.dataPointIndex];
                        console.log(selectedValue);
                        //window.location.href = 'another-page.aspx?selectedValue=' + selectedValue;
                    }
                }
			},
			labels: @Html.Raw(Json.Encode(TempData["chart_majorname"])),
			responsive: [{
				breakpoint: 480,
				options: {
					chart: {
						width: 200
					},
					legend: {
						position: 'bottom'
					}
				}
            }],
            legend: {
                position: 'bottom',
                show: false
					},
			//colors: [ danger, info,primary, success, warning]
            theme: {
                palette: 'palette6' // upto palette10
            }
		};

		var chart = new ApexCharts(document.querySelector(apexChart), options);
		chart.render();
	}