Getting error while claiming phone number in amazon connect

I created a free account in aws and trying to claim phone number in amazon connect but getting below error: We couldn't claim your phone number Please try again. If you need help, contact AWS Support. I can see 5 numbers in the list and if i change the option then error is different "You have reached maximum limit..."

I can't raise a support ticket as it is free account and don't want to switch to paid version only for this error. Till now i have tried below scenarios:

1. Deleted instance multiple times and created new but didn't work.
2. Select region as N virginia
3. Check the quota for phone number per instance (default is 5).

I am still stuck and looking help from experts.