DH support is based on emails.
However, if you purchase L2, L3, or L4 hosting plan, you will have Call tech support.
It varies. The ticket to DH support is specified to different categories. You can send a “Emergency” ticket and they will reply to you very fast. If you are not in a hurry, just send a normal ticket, they will reply in 72 hours. But this is not accurate. It varies depending on the situations.
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