You need to have a secondary location for backups, not AWS. Stores copie of customer data, orders, accounts, balances and anything that is critical to the business.

If AWS ever screws up, you will be able to continue running the business even if it might take weeks to start over.

For live redundancy, you should have a secondary datacenter on another provider, but realistically it's hard to do and most business never achieve that. Instead, just stick with AWS and if there is a problem the strategy is to sip coffee while waiting for them to resolve it. Much better this way than you having to fix it yourself.