If a firewall rule blocked your own address after repeated sign-in failures, open a ticket with the address and the order reference. Shared plans also unblock from the panel's security page when your current address can still reach it. Do not disable the firewall entirely.
Sign in to the client area and keep the order reference nearby. Prices and windows on thedatadynamo.site stay in Indian rupees, with a 7-day cancellation on new hosting orders and no fee return on a domain once it is referenced.
Write the exact error into a support ticket. For mail and DNS, allow up to 48 hours of cache time before treating the change as failed. For a plan that is too small, use an upgrade and pay the difference rather than opening a second overlapping service.