The address on your promo campaign is pulled from the labels address in the system. If you want to remove the address, just delete the address completely then click "Apply."
This will update on all promos form that label. If it is still incorrect after clicking "Apply", try clearing your cache then re-loading the promo.
To find the label details page, follow these steps:
- Go to "Labels -> Record Labels"
- Select your label and remove the address from under the "General Information"