Scratch out SMS as it does not work outside US.
After those details you provided, I would not recommend uninstalling/reinstalling STHM at this point.
Contact Konnected support first to see if they can offer any details or fixes for the Siren. tagging @heythisisnate
Here is a thread on Konnected after groovy: https://community.smartthings.com/t/konnected-io-after-groovy/251750
Here is the Konnected Community Forum and Konnected Support