You can always check your subscriptions on Apple here: https://apps.apple.com/account/subscriptions and make sure to have 1 subscription of Anghami Plus only.
If you have 2 subscriptions to Anghami Plus, you need to cancel one of them.
Apple allows you to have multiple subscriptions for the same service in case you did not cancel the previous subscription. You need to contact Apple support to request a refund of the second payment done, you can contact them on this link: https://getsupport.apple.com/, and they should be able to help you.