Could you share more information with us about what exactly you are referring to?
We have checked your account and found an Adobe Export PDF subscription registered under it, which was actually purchased through Apple iTune store.
If you are referring to the this, the you need to contact to iTune support for the cancellation. As Adobe doesn't have hold on any purchase made through the iTune/Play Store. Also, because the transaction was made to iTune so only they would be able to cancel and process the refund for the service.
Let us know if any further assistance is required.