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Its a SCAM.
If you send to a bank account then you are not using Paypals site to make the payment.
Paypal does not do escrow.
No funds in your paypal balance means the buyer HAS NOT PAID.
The email you sent is probably to a FAKE help site (they have phones and live chat all fake that users mistakenly reach if they use google to search for paypal phone numbers etc) The only way to get the real paypal is by using help/contact bottom of paypal pages.