How do I avoid my balance?

Okay, I've created a PayPal business account so I can sell my Disney and Universal tickets to somebody, and now that they keep $ 300 for 21 days, I've already sent confirmation that the tickets are sent by email. Mail was sent, and also the lady I was in. You should call PayPal and confirmed, but I was real and the tickets were real. How do I handle them if I hold them for 21 days? Everyone knows that I will catch up with them