Update troubleshooting-billing-issues.md

Author: Blargian

docs/cloud/manage/troubleshooting-billing-issues.md

@@ -129,4 +129,4 @@ unpaid invoices before initiating data deletion. There will be no automatic data
 deletion after 30 days.
 
 If you’d like to add additional credits before your existing ones expire or are 
-depleted, please contact us at [[email protected]](sales@clickhouse.com).
+depleted, please [contact us](https://clickhouse.com/company/contact).