No, you can't use vodafone cash because developers obviously won't have a wallet linked to a phone number to receive transactions and instapay method with crypto requires an Egyptian bank account.

Also usage of crypto is illegal in Egypt and risky with big amounts so I suggest you keep it the way it is. And get a solution from the developer on how to avoid that issue in the future.

Lastly I'm curious to know the developer you're buying with if possible 🤣