In case you are unable to view the balance in your wallet, follow the below process.
This could be because of a Bad Network connection, we recommend trying after sometime or changing the internet connection
If you are using the Metamask extension (desktop version) - Hard refresh your website and you should be able to view the balance
Make sure the right network is selected basis the token you have purchased ( sample snapshot mentioned below)
If you are using the Metamask app, pull the screen down to refresh the account
Web Extension View
Mobile View
To Refresh your wallet on Mobile
Choose the correct account in case you have multiple
Some additional useful links
How to add network on Metamask - Link
More FAQ's on Metamask - Link
In case you have followed the above however still unable to see crypto you make contact with Metamask here - Link