Pandora Subscription

I have subscribed to Pandora on my iPhone for approximately six months in order to remove advertisements. On July 30th, I used Pandora and now I am getting advertisements again. Unfortunately, since it was background music for a party I was hosting, I was forced to shut it off . Please, reset my account so I no longer get the advertisements? Automatic payments have been charged to my credit card each month for this service.

If this request is to the wrong department, please forward and advise by email response.

Thank you,

Karen Moon