Wrongly charged for late payment

[firbear]

I purchased a product on PayPal credit on 6 May and set up a Direct Debit.

Today I had an email from PayPal charging me for a late payment. 

I checked my bank account and confirmed that a DD had been set up and a payment had been taken on 6 May but not taken this month.

Customer service go home at 6:30 so no chance of speaking with anyone so messaged and now waiting to see if they get back to me.