my project is retrieve data from power meter and show on dashboard grafana ,i want to customize my message format but value that i want to retrive is not show in preview in notification template value that i want i metadata

this is my template

{{ define "test" }}
  {{- if eq .Status "firing" -}}
    {{- range .Alerts -}}
      {{- $name := .Labels.alertname -}}
      {{- $value := .Annotations.__value_string__ -}}
      {{- if eq $name "Electricity-Cost" -}}
Alertname: {{ .Labels.alertname }}
Cost : {{ .Labels.cost }}
Value : {{ $value }}
      {{- end -}}
    {{- end -}}
  {{- else -}}
There are no alerts
  {{- end -}}
{{ end }}

this is payload

{
    "status": "firing",
    "annotations": {
      "__dashboardUid__": "admg1lokxou80d",
      "__orgId__": "1",
      "__panelId__": "15",
      "__value_string__": "[ var='C0' metric='Electricity-Cost' labels={} value=2.10375654e+06 ]",
      "__values__": "{"C0":2103756.54}"
    },
    "labels": {
      "__alert_rule_uid__": "ednq67wwieqkga",
      "__grafana_autogenerated__": "true",
      "__grafana_receiver__": "grafana-alert-telegram",
      "alertname": "Electricity-Cost",
      "cost": "costover",
      "grafana_folder": "energy"
    }

i need to show value in message if value of electricity cost is great than condition it’s will alert