Cancel service

On the 19th of November I emailed to cancel my service before it deducts 1st of December. Noticing now it did deduct. I want immediate refund. I emailed to [Email Removed] --> wish to cancel my YelloData add on service activated on 06/11/2015 - MP***8-1. I find no use to have it added to my account, for R127 a month I can just add R30 and buy 1gig of data. I barely use my phone in a mall or hotspot area to make use of the hotspotter service. And my phone is backed up on Samsung Switch weekly, so please cancel the service with immediate effect before month end.