What wallet are you talking about, and what account are you also referring to? Both phrases are supposed to be used differently.
 
If it’s for a wallet, which you are supposed to have a private key or phrase to, as long as you have them, you can still access the wallet by reinstalling it and importing it back.
 
But if it’s for an exchange account that you request for account deletion, it’s only between you and the customer care to determine the safety of your coins. Unless what you did was just to uninstall the exchange app, which you can still install back using your login details and gain back access to the account.