@Alphonse Okossi To request a quota increase, go to the portal and file a support request.
On the New support request page, under Basics tab, select the following options:
- Issue type: Service and subscription limits (quotas)
- Subscription: the subscription you want to modify
- Quota type: HDInsight
Select Next: Solutions >> On the Details page, enter a description of the issue, select the severity of the issue, your preferred contact method, and other required fields.
You can follow the step by step procedure from Requesting quota increases for Azure HDInsight
Do let us know if you need further help.
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