Cancel services - I need a refund for the latest payment

I just recived a paypal notification that I was charged another month of service. I cancled last month and the screen said my subscription was canceld successfully. I assumed that ment I was done. I guess not. I was just now charged another $10. Please cancel my subscription and issue a refund. 

Hello,

We sincerely apologize for this.

We acknowlege the charge through invoice #79278161.

I have issued a refund on the same invoice for $9.95. 

The subscription is already cancelled - so you should not expect to be charged again.

Please accept our appologies - and let us know how we can assist further.