Cash App complaint: I can not find my original cash app account which holds a $500.00 balance

My original cash app account name is $lenwms This account has a $500.00 balance sent to me by a friend. Each time I use the cash app ID $Lenwms it asks me to put in my credit card number beginning with 4815
When I put in the correct number, was app says that the credit card number is incorrect. I have emailed cash app many times about this and they send email responses to me from a different person each time with instructions that are NOT helpful at all. I need your help. I know the account still exists because I was recently sent money to that account. However can not access that account by using my email, phone or cash app tag. Cash app should have a record of this account and should be willing to speak with me to help access the account so that I can use the money that has been sent to me. Instead of sending me worthless emails that are useless.