How can you deactivate a premium SMS service (SMS/MMS value-added service) that you've subscribed to?
You can find the deactivation order in general information through the service, e.g. on the website or in the advertisement.
For example: STOP Weather at 999 or STOP ALL at 999 to turn off all your subscriptions for these short numbers.
Find a list of all Sunrise partners here.
You can generally block all premium SMS messages in My Sunrise.