I activated Mobitel Job alerts for one Month ago and then found there is no way to deactivate. I searched official Mobitel.lk, but it contains details on how to activate various alerts but no details on how to deactivate. Then I called Mobitel Customer Care Hotline number (helpline), 1717. and got this information.
To de-register from an alert
Type dereg alert_name and send to 2299
Eg. To de-register job alters type “dereg job” and send to 2299
Lankapuvath English DREG LP DGI English DREG DGI MCNS English DREG CNS Ada Derana English DREG AD Hiru Sinhala DREG HN Soorian Tamil DREG SN Gold English DREG GN
You should aware that these types of alters are called push notifications. When a customer registers for such alert they continually have to pay the monthly (or daily amount for a news alert) until you deactivate.