Tried to delete a contact in Marketing Cloud through the API 

/contacts/v1/contacts/actions/delete?type=ids

{
  "values": [
    "1131976968"
  ],
  "DeleteOperationType": "ContactAndAttributes"
}

It tells me the operation is not enabled. The only other occurence I could find after searching the forums is that someone posted that you have to ask Support to enable this. So I asked support and they told me I need to ask the forum.

{
    "operationInitiated": false,
    "operationID": 3,
    "requestServiceMessageID": "478343ae-33ac-4a77-a5bc-0b803cd0a84d",
    "responseDateTime": "2017-12-11T08:56:26.6365841-06:00",
    "hasErrors": true,
    "resultMessages": [
        {
            "resultType": "Operational",
            "resultClass": "Error",
            "resultCode": "OperationDisabled",
            "message": "The Contact Delete operation is not currently enabled."
        }
    ],
    "serviceMessageID": "0ae44e81-c2f7-4322-b411-693b827abd8e"
}

When I update a user's email, no email is sent to the new address, and the old email remains. The only way to change an email is to deactivate the user and create a new user. How can I change the email for an existing user?

Tried to delete a contact in Marketing Cloud through the API 

/contacts/v1/contacts/actions/delete?type=ids

{
  "values": [
    "1131976968"
  ],
  "DeleteOperationType": "ContactAndAttributes"
}

It tells me the operation is not enabled. The only other occurence I could find after searching the forums is that someone posted that you have to ask Support to enable this. So I asked support and they told me I need to ask the forum.

{
    "operationInitiated": false,
    "operationID": 3,
    "requestServiceMessageID": "478343ae-33ac-4a77-a5bc-0b803cd0a84d",
    "responseDateTime": "2017-12-11T08:56:26.6365841-06:00",
    "hasErrors": true,
    "resultMessages": [
        {
            "resultType": "Operational",
            "resultClass": "Error",
            "resultCode": "OperationDisabled",
            "message": "The Contact Delete operation is not currently enabled."
        }
    ],
    "serviceMessageID": "0ae44e81-c2f7-4322-b411-693b827abd8e"
}

When I update a user's email, no email is sent to the new address, and the old email remains. The only way to change an email is to deactivate the user and create a new user. How can I change the email for an existing user?